artisan PD-ISA16V3 User manual
File: tdc_pd-isa16v3_321e.doc
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Operating Electronics
for Spectral Sensors
and Linear Image Arrays
PC/AT-ISA Interface Electronics
PD-ISA16V3
Technical Documentation
Board: PD-ISA16V3-2 (06010.35 / 06010.36)
PLD: tim.602 / tim.507 / adrisav3
Document:Part ‚I’, Version 3.21_E, 09.11.00 18:24
PC Interface Electronics PD-ISA16V3 Technical Documentation V3.21_E
Table of Contents
tec5 AG Page I 2 / 27
I. PC/AT-ISA Interface Electronics PD-ISA16V3
Table of Contents
I.1 General..............................................................................................................................................3
I.2 Construction and Interfaces...............................................................................................................3
I.3 Circuit Description..............................................................................................................................3
I.3.1 16 bit ISA Bus Interface ..............................................................................................................4
I.3.2 Control Ports and Status Port .....................................................................................................5
I.3.3 Lighting Control...........................................................................................................................7
I.3.4 FIFO Buffer Memory ...................................................................................................................8
I.3.5 PDA Readout Clock Control Unit................................................................................................8
I.3.6 Scan Cycle Clocking, Timer........................................................................................................9
I.3.7 Interrupts...................................................................................................................................10
I.3.8 Internal and External Scan Cycle Triggering / Chopper Operation ..........................................12
I.3.9 Test Mode Simulated Frontend Electronics..............................................................................13
I.4 Arrangement of Components...........................................................................................................14
I.5 Board Settings .................................................................................................................................15
I.5.1 I/O Base Address (Dip Switch Block SW1)...............................................................................15
I.5.2 Connecting On-Board, internal IRQs to PC IRQs (Jumper 1) ..................................................15
I.5.3 Wait States (Jumper 3) .............................................................................................................16
I.5.4 Flash Control (Jumper 4 and 5) ................................................................................................16
I.5.5 Test Mode Simulated Frontend Electronics (Jumper 6) ..........................................................16
I.5.6 Solder Bridges (BR1 to BR8)....................................................................................................17
I.6 Survey of Specifications ..................................................................................................................17
I.7 Connector Pin Assignment..............................................................................................................18
I.7.1 Connector ST2 (to Frontend Electronics) .................................................................................18
I.7.2 Connector ST1 (Flash Control and Trigger)..............................................................................19
I.7.3 Connector J2 (Service Connector)............................................................................................20
I.8 Standard Version, Jumper and Solder Bridges..............................................................................21
A1 Circuit diagram PC/AT Interface Electronics PD-ISA16V3 ...............................................................22
A1.1 Circuit diagram PC/AT Interface Electronics PD-ISA16V3 / Page 1 of 6...................................22
A1.2 Circuit diagram PC/AT Interface Electronics PD-ISA16V3 / Page 2 of 6...................................23
A1.3 Circuit diagram PC/AT Interface Electronics PD-ISA16V3 / Page 3 of 6...................................24
A1.4 Circuit diagram PC/AT Interface Electronics PD-ISA16V3 / Page 4 of 6...................................25
A1.5 Circuit diagram PC/AT Interface Electronics PD-ISA16V3 / Page 5 of 6...................................26
A1.5 Circuit diagram PC/AT Interface Electronics PD-ISA16V3 / Page 6 of 6...................................27
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I.1 General
The PC/AT Interface Electronics type PD-ISA16V3 is part of the PC/AT Operating Electronics for
Spectral Sensors or MOS Linear Image Sensors.
Functionally, it allows the PC to control the Front End Electronics, to which the currently used Spectral
Sensor is connected. The analog video signal originating from the sensor is digitized in the Front End
Electronics and buffered in a FIFO - memory located on the Interface Board.
A clock control unit is integrated on the Interface Board, allowing autonomous control of various read-
out cycles. To acquire a spectrum, the PC only has to select the appropriate read-out cycle, to set its
parameters and to initiate it. With each read-out cycle completed, a scan counter located on the
Interface Board is incremented. During acquisition of spectral data, the PC is free for additional tasks.
At any time, it may either read the scan counter or get information on the status of spectral data
acquisition by reading the filling grade of the FIFO memory.
I.2 Construction and Interfaces
The PC/AT Interface Electronics is designed as a plug-in board for the 16 bit AT (ISA) bus and is
100 mm x 160 mm in size.
There are two connectors on the backplate of the plug-in board: one 25-pin and one 9-pin Sub D
connector. The 25-pin connector serves as an interconnection for the front-end electronics. The
signals available on the 9-pin connector allow for additional functionality, such as computer-controlled
flashlamp triggering or synchronization of the read-out procedure to the process (e. g. a chopper
wheel).
As an alternative to the 25-pin cable interconnection to the Frontend Electronics, the Frontend board
may be directly plugged onto the PC Interface Board. The electrical connection is provided by an
array of socket connectors, arranged in parallel to ST2. Two holes are provided near the center of the
PC Interface Board for mechanically fixing the arrangement.
I.3 Circuit Description
The PC-Interface Electronics circuitry can be roughly classified in five functional groups (circuit
diagrams are contained in the appendix):
!16 bit ISA bus interface (Diagram 1/6)
!Control and status ports, lighting control (Diagram 2/6)
!FIFO - buffer memory (Diagram 3/6)
!PDA (Photo-Diode-Array) readout clock control unit
scan cycle control (Diagram 4/6)
!Timer / counter (Diagram 5/6)
Circuit diagram 6 shows the pinouts of the ISA bus connector, of the socket connector for the
Frontend Electronics and of the service connector.
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InterruptControls
Connector ST1
Control
Register
Latches
#1 and
#2
Light Control
Driver
Spectrometer
Readout
Control
LightControlOut
VCC_LCtr_In
StoreEnable
StartScan
TimerModeControls
LightControl
ExtReadoutTrigIn
ExtIRQIn
IRQResets
ADCDataIn
ReadoutControl
Connector ST2
FIFO-Memory
>= 2K * 18Bit
16 Bit ISA BUS-Interface
Status
Register
Latch
Bit2**8MSB
Bit2**8LSB
ScanRunning
FifoFull
ExtReadoutTrigIn
16
IntIRQIn
Interrupt Logic
ExtIRQIn
EOS
FifoNotEmpty
8
IntIRQIn
Clock
Timer #1
Counter
8254
IRQA
IRQB
IRQ3
IRQ5
16 Bit ISA BUS
+5V int.
FifoReset
PCINTRxx.pre
16
8
16 Bit Databus
4
+12V
-12V
Ground
+12V int.
-12V int.
GND
IRQ9
IRQ15
Access Control Signals
WriteLSB / Write MSB
ADCDataBit2**8
8
ShutterControl ShutterControl
+5V int.
IRQSelects
ExtIRQIn
FifoHalfFull
TimerIRQ
StartScanControls
GND
MultiplexerControls
Timer #2
FifoEmpty
FifoHalfFull
Fig. I 1: Block diagram of the PC Interface Electronics
I.3.1 16 bit ISA Bus Interface
The 16 bit ISA bus interface supports I/O read- and write access with 16 and 8 bit words with standard
count or without wait cycles. The interrupt request signals produced by the plug-in board can be
jumpered to use the IRQ3, IRQ5, IRQ9 or IRQ15 PC-signals.
The PC/AT Interface Board uses a block of 16 consecutive I/O addresses, starting from the base
address. The base address can be set in steps of 16 within the PC I/O address range.
IC 1 compares the I/O base address set by the DIP switch array (address bits A4 .. A9) to the bus
address bits SA4 .. SA9. Equality activates the address decoder GAL 'ADRISAV3', which performs
access decoding, also considering the signals SA0 .. SA3, IOR#, IOW# and BHE#. After activating the
data bus drivers (via the signals BEL and BEH), this GAL commands the selected component (chip-
select for timers 1 and 2: signals TIMER1# and TIMER2# or read/write pulse for the status register
(signal R-STS-C#), the control registers 1 and 2 (signals W-CTL-C1 and W-CTL-C2) or FIFO memory
(signal R-FIFO-C), respectively).
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The following table shows the possible data transfers between the PC and the components of the
PC/AT Interface Board (overview):
I/O - address
data word length transfer direction component addressed
Base + 00HEX 16 bit write control register #1
Base + 00HEX 16 bit read status register
Base + 02HEX 16 bit write control register #2
Base + 02HEX 16 bit read FIFO - data word
Base + 04HEX 8 bit write/read timer #1 timer 0
Base + 05HEX 8 bit write/read timer #1 timer 1
Base + 06HEX 8 bit write/read timer #1 timer 2
Base + 07HEX 8 bit write timer #1 control port
Base + 08HEX 16 bit write/read reserved
Base + 0AHEX 16 bit write/read reserved
Base + 0CHEX 8 bit write/read timer #2 timer 0
Base + 0DHEX 8 bit write/read timer #2 timer 1
Base + 0EHEX 8 bit write/read timer #2 timer 2
Base + 0FHEX 8 bit write timer #2 control port
If jumper J3 is set, the PC Interface Board activates the signal 0WS# (zero wait states) with each
access. This shortens I/O access times, since the standard waits during a CPU cycle are omitted
(16 bit access: 2 instead of 3 bus cycles, 8 bit access: 3 instead of 6 bus cycles).
I.3.2 Control Ports and Status Port
The Interface Electronics contains two control ports and one status port. The control ports enable the
PC to control all actions within the Operating Electronics. All return signals may be read by the PC via
the status port.
port
word length / used word length ICs
control port #1 16 bit / D0 ... D15 LSB: IC 3 / MSB: IC14
control port #2 16 bit / D0 ... D7 LSB: IC 29
status port 16 bit / D0 ... D 15 LSB: IC 6 / MSB: IC 28
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Signal assignment for control port #1:
data bit signal
designation comment
D0 STOR_E1# store enable 1, enables data storage
D1 FIFO_R# FIFO reset, erases FIFO memory
D2 STSCAN1# start scan 1, rising edge activates a scan cycle
D3 IRQ-R-C# internal IRQ reset clock, clears internal IRQ
D4 EXTIR-C# external IRQ reset clock, clears external IRQ
D5 BLZ-SW software flash trigger, trigger signal for lighting control, directly influences
external lighting control signal
LIGHTOUT
D6 INTSEL0 interrupt select 0 and
D7 INTSEL1 interrupt select 1 select the interrupt source
D8 TIMSELM0 timer select 0 and
D9 TIMSELM1 timer select 1 select timer operating mode
D10 STS-SEL0 start scan select 0 and
D11 STS-SEL1 start scan select 1 determine the signal source for
starting a scan cycle
D12 BLZ-HW-E hardware flash trigger, enables the scan-synchronous activation of the
external lighting control signal LIGHTOUT under hardware control
D13 BO_SEL2 board select 2, control signal routed exclusively to the status port for
monitoring and test purposes (test base address setting or function of the bus
interface), see also signals BO-SEL0 and BO-SEL1 in control port #2
D14 IRQ-SEL0 interrupt request select 0 and
D15 IRQ-SEL1 interrupt request select 1 for selection of the source signal for the internal
interrupt request
Signal assignment for control port #2:
data bit signal
designation comment
D0 FEESEL0# Frontend Electronics select 0 and
D1 FEESEL1# Frontend Electronics select 1, multiplexer control signals
D2 ZEIL_RES array reset, reset signal for detector array or Multiplexer mode of
operation
D3 SHUT-EA shutter on/off, shutter control signal
D4 SHUT-R shutter direction, shutter control signal
D5 STSC_R_C test-start-scan reset clock, clears filp-flop
D6 BO-SEL0 board select 0 and
D7 BO-SEL1 board select 1, control signal routed exclusively to the status port for
monitoring and test purposes (test base address setting or function of the
bus interface), see also signal BO-SEL2
D8 .. D15 reserved reserved
Remark: When switching on or resetting the PC, all control signals of both control ports are reset to
logical 0.
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Signal assignment for the status port:
data bit signal
designation comment
D0 IRQIN1 internal interrupt request
D1 EXTIRQIN external interrupt request
D2 FULL# FIFO full, FIFO memory full
D3 EMPTY# FIFO empty, FIFO memory empty
D4 SCANRUN scan running, readout of the array active
D5 STSCAN8 start scan 8, external scan trigger signal
D6 BIT9-LSB FIFO memory bit 2**8 of low Byte
D7 BIT9-MSB FIFO memory bit 2**8 of high Byte
D8 BO-SEL0 board select 0 and
D9 BO-SEL1 board select 1 and
D10 BO-SEL2 board select 2 for test and monitoring of the bus interface
D11 HALF# FIFO half, FIFO memory half full
D12 BUSY Frontend ADC busy (for test operation without FEE)
D13 STS_SC_F Frontend start scan, stored (for test operation without FEE)
D14 EX-IRQ-I external interrupt request input, original signal from ST1 pin 1 unbuffered
D15 reserved reserved
I.3.3 Lighting Control
The PC Interface Board provides two signals at connector ST1 (lighting control voltage input VCC_BLZ
and control output LIGHTOUT), allowing to activate a lighting source (e. g. a flashlamp). The voltage
swing of LIGHTOUT amounts to +5V or VCC_BLZ, depending on the setting of jumper 4. Lighting
control is possible in one of three modes of operation:
mode of operation
settings required comment
PC software controlled,
digital output jumper 5 in position 1 polarity determined by software
PC software controlled,
pulse output control signal BLZ-HW-E
inactive (logic 0),
jumper 5 in position 2
or position 3
jumper 5 sets polarity
R1 and C10 set pulse width,
the pulse is triggered by the rising
edge of the control signal BLZ-SW
hardware controlled,
pulse output control signals
BLZ-HW-E active (logic 1) and BLZ-
SW inactive (logic 0),
jumper 5 in position 2
or position 3
jumper 5 sets polarity,
R1 and C10 set pulse width,
before each data scan, a scan-
synchronous trigger pulse is
generated by the hardware (in PLD
TIM_5x) before each data scan. The
trigger pulse is concurrent with the
start moment of the previous
integration period.
The pulse width is fixed to 100 µs by external components connected to IC12A.
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I.3.4 FIFO Buffer Memory
The buffer memory consists of two word length cascaded, asynchronous FIFO memory chips (type
SN74ACT720x, x designates the storage capacity of the component [2:1K*9 / 3:2K*9 / 4:4K*9 /
5:8K*9] or type IDT720x, x designates the storage capacity of the component [3:2K*9 / 4:4K*9 /
5:8K*9 / 6:16K*9]).
The PC/AT Interface Electronics PD-ISA16V3 in standard version is equipped with 2 chips type
SN74ACT7203 or IDT7203 (organization 2 KByte * 9, IC7 and IC8) in plug-in sockets. For larger
memory capacity, the 2 kByte - IC's may be replaced by equivalent types, which are compatible in pin
assignment and functionality, offering larger memory sizes (currently available for up to 16 kBytes).
The three status signals 'Full#', 'Half#' and 'Empty#' as well as bits 2**8 of the LSB and the MSB -
FIFO have been routed to the status port. The status 'Full', 'Half' or 'Empty' is only derived from the
flags of the LSB - FIFO. Memory chips of the type SN74ACT720x do not provide a 'Half' flag.
I.3.5 PDA Readout Clock Control Unit
The GAL IC's 'tim_5x' and 'tim_6x' constitute the photo diode array (PDA) readout clock control unit.
Important input signals of this unit are:
o STSCAN2# initiates a readout scan or readout cycle of the PDA.
The mode of operation of the timer (Software, TimerSingle, Timer
Continuous) is determined by the scan cycle clocking.
The trigger mode of operation selects internal or external trigger.
The readout clock control unit generates one or several START_F#
- pulses for the Frontend, depending on the timer mode of operation.
o EOS_F# is the return signal from the Frontend Electronics. It terminates the
current scan (each START_F# - pulse is followed-up by an
EOS_F# - pulse).
o STORE-E1# in the timer mode of operation "software", Store Enable 1determines
whether the values obtained by the next scan shall be stored in the
FIFO memory. In both remaining timer modes of operation, the scan
cycle clocking automatically controls FIFO operation.
Store disabled: reset procedure for the PDA,
charges are dumped, if present.
Store enabled: read-out procedure
o BUSY_F ADC on the FEE converting (from FEE, some 64 kHz)
o CLK_F FEE clock (some 1 MHz)
In the course of one Scan, the PDA readout clock control unit generates the following control signals:
o SCANRUN status signal Scan Running indicates, that a read-out process is
performed currently (active from Start-Scan to End-of-Scan).
o BYTE_F control signal Byte-Select for ADC on the FEE:
High: ADC on the FEE writes the high-Byte (D8..D15) of the last
conversion result to ADC_D0 through ADC_D7
Low: ADC on the FEE writes the low-Byte (D0..D7) of the last
conversion result to ADC_D0 through ADC_D7
o WCLK-LB write clock for buffer memory, writes the LSB to the FIFO
o WCLK-HB write clock for buffer memory, writes the MSB to the FIFO
o 1PIXEL#1 status signal, indicates the time slot for sampling the signal from the
first photodiode in a scan by a logic low level
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I.3.6 Scan Cycle Clocking, Timer
The term scan cycle stands for a single reset procedure for the charges on the photodiode array
(read-out procedure without data storage) and one or more read-out procedures with spectral data
storage, sequenced with a delay of one integration period each time.
Scan cycle clocking can be set to one of three modes of operation by the PC via the two control
signals TIMSELM0 and TIMSELM1 (Mode 0, 2 or 3):
Mode of Operation 'Software' (Timer Mode 0):
TIMSELM0 = Low
TIMSELM1 = Low
The PC takes full control of array read-out, scan cycle control by hardware is disactivated, the PC also
performs integration timing.
In this mode of operation, the PC first initiates a read-out procedure by a pulse on signal STSCAN1#
(Start Scan, triggered at the rising edge) without setting signal STOR-E1# (Store Enable) and waits
for the Interface Board to finish the scan. This step resets the charges on the photodiode array.
Afterwards, the PC has to wait for one integration period (or, more exactly: integration period - scan
time) before starting a spectral data read-out procedure again by a pulse on signal STSCAN1#, this
time the signal STOR-E1# is activated. The measurement data can be transferred to the PC either (a)
during the read-out procedure for measurement data or (b) after finishing the scan. In case (a), the
Interface Electronics indicates available measurement data by means of status flags generated by the
FIFO memory. In case (b), the scan has to be finished (as in a reset procedure) before the
measurement data can be transferred to the PC.
Reserved Mode of Operation (Timer Mode 1):
TIMSELM0 = High
TIMSELM1 = Low
Mode of Operation 'TimerSingle' (Timer Mode 2):
TIMSELM0 = Low
TIMSELM1 = High
The scanning cycle is controlled autonomously by the PC Interface Board, timed by the timers 1 and 2
of the timer / counter IC #1.
The only task for the PC is to program the timer circuit for the selected integration time in multiples of
1/10 ms and, afterwards, to initiate the scan cycle by means of a pulse on signal STSCAN1#
(triggered at the rising edge). The scan cycle clocking will then first perform a reset procedure. Then,
after the programmed integration time has passed, the read-out procedure for measurement data is
executed.
The PC can detect the end of a scan cycle by polling the signal SCANRUN (scan running) or reading
the scan counter (see below). Data may be read out from the FIFO buffer memory and processed
already during the scan cycle.
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Mode of Operation 'TimerContinuous' (Timer Mode 3):
TIMSELM0 = High
TIMSELM1 = High
The scan cycle is controlled autonomously by the PC Interface Board.
The behavior in the mode of operation 'TimerContinuous' resembles the mode of operation
'TimerSingle'. The difference is that a scan cycle is not finished after the read-out procedure for
measurement data, here, integration period and data read-out procedure are repeated until stopped
by the PC (by resetting the mode of operation to mode 0).
As in the mode of operation 'TimerSingle', the PC can determine the correct moment for stopping the
cycle by polling the signal SCANRUN (scan running) or reading the scan counter (see below). Data
may be read out from the FIFO buffer memory and processed already during the scan cycle.
Scan Counter
Timer 0 of the timer/counter IC #1, which is not used by integration timing, is prepared for use as a
scan counter. To this end, GATE_0 is connected to VCC and CLK_0 is connected to the signal EOS.
I.3.7 Interrupts
The interrupt logic of the PC Interface Board offers two separate interrupt paths:
'external interrupt request' and 'internal interrupt request'.
External Interrupt Request
Its signal source is the TTL input signal EX_IRQ_I of ST1, pin 1. A rising edge of EX_IRQ_I sets the
flip-flop circuit dedicated to external interrupt request (IC4A) and activates the on-board signal
EXTIRQIN. The control signal 'INTSEL1' allows to mask the external interrupt request or to forward it
as IRQB. Depending on the connection made to jumper array 1, the request signal IRQB is then
passed to IRQ3, IRQ5, IRQ9 or IRQ15 of the PC.
The flip-flop circuit for external interrupt request (IC4A) can be reset via the control word register by
means of a pulse (active low) in signal EXTIR-C#.
The signal EXTIRQIN internal to the board is also routed to the status port to allow for polling
Internal Interrupt Request
Four different events are available as an interrupt source. The control signals IRQ-SEL-0 and IRQ-
SEL-1 allow to select one of these events by software as an on-board interrupt request (signal
IRQIN1).
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mode
IRQ-SEL-1 IRQ-SEL-0 signal source comment
0Low Low TIM-IRQ via IC4B as
EOS/TIM# output timer-IC #2 / timer 2,
application-specific function
1Low High HALF FIFO memory half full (only FIFO IDT720x)
2High Low EMPTY# FIFO memory not empty
3High High EOS# via IC4B as
EOS/TIM# End of Scan,
read-out of detector array completed
The events TIM-IRQ and EOS# (pulses active low) are buffered in the flip-flop circuit for internal
interrupt request (IC4B) (falling edge activates EOS/TIM#). The request can be reset via the control
word register by a pulse (active low) in signal IRQ-R-C#. 'FIFO not empty' and 'FIFO half full' are
directly derived from the corresponding flag signals of the FIFO memory circuits. These requests can
be reset by reading FIFO memory only.
The control signal 'INTSEL0' allows to mask the internal interrupt request or to forward it as IRQA.
Depending on the connection made to jumper array 1, the request signal IRQB is then passed to
IRQ3, IRQ5, IRQ9 or IRQ15 of the PC.
Interrupt Select via GAL 'ADRISAV3'
The table below shows the effect of the status of the interrupt select control lines on the request
signals IRQA and IRQB:
INTSEL1
INTSEL0 IRQA IRQB
Low Low inactive inactive
Low High IRQIN1 inactive
High Low inactive EXTIRQIN
High High IRQIN1 EXTIRQIN
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I.3.8 Internal and External Scan Cycle Triggering / Chopper Operation
A scan cycle may be triggered under PC-control (internally) or via external control signals. The control
signals STS-SEL0 and STS-SEL1 select one of three scan cycle trigger procedures, which are
explained in the following.
For all (three) modes:
o In timer mode of operation 'Software' (timer mode 0), each trigger directly initiates
a scan of the detector array (no matter if PC-controlled or external pulse- or edge
triggered).
o In timer modes of operation 'TimerSingle' or 'TimerContinuous' each trigger starts a
scan cycle.
In timer mode of operation 'TimerSingle', a scan cycle consists of a dummy scan, the
wait for the integration time and the data scan. In timer mode of operation
'TimerContinuous', a scan cycle consists of a dummy scan with continuously repeated
waits for the integration time and data scans.
Computer Controlled Scan Cycle Triggering (Internal, Trigger Mode 0):
STS-SEL0 = Low
STS-SEL1 = Low
Each scan cycle must be initiated by the PC by the output of a start scan pulse via control signal
STSCAN1# (standard procedure). In this mode of operation, the scan may be synchronized to
external events indirectly by polling an external status signal via one of the digital inputs and by
initiating the scan cycle from the program.
External Scan Cycle Triggering via Pulse (Trigger Mode 1):
STS-SEL0 = High
STS-SEL1 = Low
A scan cycle is triggered by hardware at each rising edge of the external signal EXT_SCANTRIG_IMP
(STSCA7#, pulse input, active low). Its repetition period must be selected longer than the integration
time currently set + scan time to be sure not to start a new scan cycle before the previous cycle is
completed.
External Scan Cycle Triggering via Edge (Chopper, Trigger Mode 2):
STS-SEL0 = Low
STS-SEL1 = High
Each edge of the external signal EXT_SCANTRIG_FLANKE (STSCAN8#) triggers a scan cycle by
hardware (IC10 and GAL TIM_6x are used for synchronization and pulse shaping of the signal
CHOPP#). The time between two edges must be selected longer than the integration time set
currently + scan time to be sure not to start a new scan cycle before the previous cycle is completed.
In this mode of operation it is possible, for example, to use the sync output signal of a chopper wheel
directly as external scan trigger signal. At each level transition, a scan cycle is started and, in this
way, dark current and measurement spectrum are acquired alternately in a continuous sequence. The
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external scan trigger signal STSCAN8# is also routed to the status port on the PC Interface Board,
allowing e. g. to monitor the chopper rate with the PC. Furthermore, the PC - Interface Electronics
offers the possibility to determine whether a full scan cycle could be performed in chopper mode in the
corresponding phase (illuminated or darkened). To this end, the scan trigger signal STSCAN8#
(position 2-3) must be forwarded to bit 2**8 of the MSB - FIFO by means of the solder bridge BR5
instead of the identification signal for the first pixel (position 1-2). In this case, the additional
information can be collected by the PC from the status port for each array pixel in parallel to reading
out the spectral data from the FIFO memory.
Reserved (Trigger Mode 3):
STS-SEL0 = High
STS-SEL1 = High
I.3.9 Test Mode Simulated Frontend Electronics
Starting from version 3 of the PC Interface Board, the board's functions may be tested without a
Frontend connected to it.
To simulate a scan procedure, the following steps have to be made:
o connect all positions (1...4) in jumper array J6
o program the timer IC #2 / timer 0
for fOUT = 1 MHz with a duty factor 1:1 (division ratio 4:1)
for simulation of the clock signal CLK_F of the Frontend Electronics
o program the timer IC #2 / timer 1
for fOUT = 62,5 kHz with a duty factor 1:1 (division ratio 16:1)
for simulation of the signal BUSY_F of the Frontend Electronics
o reset the flip-flop circuit IC18B (test start scan) (pulse in signal STSC_R_C)
o generate a start scan
o poll the BUSY signal and count n pixel cycles (e. g. n=256 for 256 pixel array)
o simulate an End Of Scan via the control signal SHUT_EA / EOS_SIM#
Then, for example, the checks that may be performed are:
o whether the correct number of n values was stored in the FIFO memory
o whether the End-of-Scan counter was incremented and
o whether the StartScan signal START_F# was present on connector ST2 (by reading
the status of the flip-flop circuit 'Test Start Scan' via status signal STS_SC_F).
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I.4 Arrangement of Components
J5 BR7 BR8 Service J2 BR1
J1 SW1 J3 J6 J4
Fig. I 2: View of the PC/AT Interface Electronics, component side
BR 2 BR3 BR4 BR5
BR6
Fig. I 3: View PC/AT Interface Electronics, solder side
PC Interface Electronics PD-ISA16V3 Technical Documentation V3.21_E
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I.5 Board Settings
I.5.1 I/O Base Address (Dip Switch Block SW1)
The I/O base address of the plug-in board
is set by switches 1...6 of the DIP switch block
SW1
(ON corresponds to Low).
Default setting: address 300 Hex
switch 1 : address bit 2**4
on to
switch 6 : address bit 2**9
Table of I/O base adresses supported by the
demonstration software:
Adresse S1 S2 S3 S4 S5 S6
200H on on on on on off
240H on on off on on off
280H on on on off on off
2C0H on on off off on off
300H on on on on off off
310H off on on on off off
320H on off on on off off
330H off off on on off off
I.5.2 Connecting On-Board, internal IRQs to PC IRQs (Jumper 1)
Jumper 1 may be used to assign the two interrupt output signals of the Interface Board IRQA and
IRQB to the interrupt request channels IRQ3, IRQ5, IRQ9 or IRQ15 of the PC.
IRQA is connected to all pins #3, IRQB is connected to all pins #1. The PC's IRQs are each routed to
pin 2 of the corresponding row. Caution: It is not allowed to connect both interrupt output signals to
the same interrupt request channel of the PC.
Assignment:
Connection IRQA with IRQ15 jumper 'IRQ15' pin 2-3
Connection IRQA with IRQ9 jumper 'IRQ9' pin 2-3
Connection IRQA with IRQ5 jumper 'IRQ5' pin 2-3
Connection IRQA with IRQ3 jumper 'IRQ3' pin 2-3
Connection IRQB with IRQ15 jumper 'IRQ15' pin 1-2
Connection IRQB with IRQ9 jumper 'IRQ9' pin 1-2
Connection IRQB with IRQ5 jumper 'IRQ5' pin 1-2
Connection IRQB with IRQ3 jumper 'IRQ3' pin 1-2
Factory default setting: no connections
Example: the marked jumper positions connect IRQA to IRQ3 and IRQB to IRQ5.
Remark: the digits '1' and '3' on the circuit board designate the pin rows 1 and 3 (but not pins 1 and 3)!
Adressbit 2**
4 5 6 7 8 9
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
A
ddress 300H
Example:
Address 2C0H
IRQ3
IRQAIRQB
IRQ15
IRQ5
IRQ9
3
2
1Pinrow
IRQ-Connection
Jumper 1
PC Interface Electronics PD-ISA16V3 Technical Documentation V3.21_E
tec5 AG Page I 16 / 27
I.5.3 Wait States (Jumper 3)
With jumper J3 closed, the PC Interface Board
activates the signal 0WS# at each access.
The activation of the signal 0WS# (zero wait states)
shortens memory or I/O access times by omitting waits
normally inserted to the CPU cycles.
(16 bit access in 2 instead of 3, 8 bit access in 3 instead of 6 bus cycles).
Assignment:
shortened CPU access cycles J3 jumpered
standard CPU access cycles J3 open
Factory default setting: J3 open (standard CPU access cycles)
I.5.4 Flash Control (Jumper 4 and 5)
The PC Interface Board offers one output for controlling a lighting source
(e. g. a flashlamp) synchronously with the read-out procedure of the
array, PC or hardware controlled modes are available
The jumpers 4 and 5 are used to set the voltage source (+5V internal or
external source) and the signal's polarity (see also section 'Lighting
Control').
Remark: The digit '1' on the circuit board designates
position 1 (not pin 1)!
Factory default setting: internal voltage source (+5V), pulse active low
I.5.5 Test Mode Simulated Frontend Electronics (Jumper 6)
Closing all jumpers of the jumper array J6 puts the PC Interface Board into a test mode of operation,
which allows operation of the board without a Frontend Electronics connected (simulation of the
Frontend operation).
For normal operation, all jumper in jumper array 6 have to be removed.
Factory default setting: no connections
0WS#
Jumper 3
Jumper 4
external / internal
Jumper 5
1
2
3
Software Control
Pulse active high
Pulse active low
PC Interface Electronics PD-ISA16V3 Technical Documentation V3.21_E
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I.5.6 Solder Bridges (BR1 to BR8)
BR1: position 1-2: ST2/pin22 = ZEIL_RES position 2-3: ST2/pin22 = Ground
or TIM_IRQ (see BR8)
BR2: open: ST2/pin14 = FEE_SEL0 closed: ST2/pin14 = Ground
BR3: open: ST2/pin15 = FEE_SEL1 closed: ST2/pin15 = Ground
BR4: open: ST2/pin16 = 1st PIXEL closed: ST2/pin16 = Ground
BR5: position 1-2: bit D8 MSB-FIFO = 1PIXEL#1 position 2-3: bit D8 MSB-FIFO = STSCAN8#
BR6: position 1-2: ST1/pin 7 = SHUT_R position 2-3: ST1/pin7 = 1st PIXEL
BR7: open: gate timer #2/2 = VCC closed: gate timer #2/2 = EOS_F#
BR8: position 1-2: ST2/pin22 = ZEIL_RES position 2-3: ST2/pin22 = TIM_IRQ
Remark: The factory default setting has been underlined.
I.6 Survey of Specifications
Functional Characteristics
!Trigger a reset procedure (photodiodes read-out without data storage)
!Trigger a read-out procedure with data storage in the buffer memory of the Interface
Board
!Trigger a measurement procedure (reset, integration timing, read-out)
!Trigger the acquisition of a series of sequential spectra (reset and several read-out
procedures, each time with integration period) with process sequencing within the
Interface Board
!Two onboard timer IC's,
timer #1: integration timing, scan counter
timer #2: precision time measurements, timer/counter 2 is freely available
!FIFO buffer memory 2 K words (max. 32 K words)
!Data transfer from the FIFO also during the measurement, so that continuous spectra
acquisition is possible
!Trigger output 1: TTL or external level, e.g. for triggering a flashlamp
!Trigger output 2: TTL level, outputs a pulse at read-out of the first pixel in each scan,
also usable as a universal digital output
!Trigger output 3: universal TTL output, e.g. for shutter control
!Two trigger inputs (TTL) e. g. for synchronization of spectral data acquisition, or,
alternatively, digital inputs
!Selectable function of the interrupt (external, read-out finished, FIFO not empty/half
full, or timer 2; IRQ 3,5,9 or 15), or universal digital input
Interfaces
!Interface with Frontend Electronics: DSUB25 socket connector
!External interface: DSUB9 pin connector
!Power supply: +5 V, <500 mA from the PC
!PC interface: IBM compatible, AT (ISA) bus, 16 bits
!16 I/O addresses (4*16 bits / 8*8 bits),
base address selectable in steps of 16 in the range from 000H to 3F0H
!Circuit board dimensions: 100 * 160 [mm]
PC Interface Electronics PD-ISA16V3 Technical Documentation V3.21_E
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I.7 Connector Pin Assignment
I.7.1 Connector ST2 (to Frontend Electronics)
Connector type: 25 pin SUB-D connector, socket contacts
pin signal designation explanation
1D0/D8 ADC data bit D0 or D8
2D1/D9 ADC data bit D1 or D9
3D2/D10 ADC data bit D2 or D10
4D3/D11 ADC data bit D3 or D11
5D4/D12 ADC data bit D4 or D12
6D5/D13 ADC data bit D5 or D13
7D6/D14 ADC data bit D6 or D14
8D7/D15 ADC data bit D7 or D15
9BUSY_F ADC busy output
10 EOS_F# sensor end of scan
11 START_F# sensor start scan
12 BYTE_F ADC byte select
(D0..D7 or D8..D15)
13 GND ground
14 FEE_SEL0 (GND)
(*) alternatively
multiplexer control signal 0 (BR2 open) or ground (bridge BR2
installed)
15 FEE_SEL1 (GND)
(*) alternatively
multiplexer control signal 1 (BR3 open) or
ground (bridge BR3 installed)
16 1st PIXEL (GND) (*) alternatively
control signal 1st pixel in array (BR4 open) or ground (bridge BR4
installed)
17 GND ground
18 GND ground
19 GND ground
20 GND ground
21 GND ground
22 Z_RES_F (GND) alternatively
sensor reset or multiplexer mode of operation
(BR1 in position 1-2) or
ground (bridge BR1 in position 2-3)
23 -12V_F -12V power supply output
24 CLK_F sensor read-out clock
25 +12V_F +12V power supply output
Remark (*): In the standard shipping version of the PC Interface Board, the signal lines are connected
to the corresponding control signals (not to ground).
PC Interface Electronics PD-ISA16V3 Technical Documentation V3.21_E
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I.7.2 Connector ST1 (Flash Control and Trigger)
Connector type: 9 pin SUB-D connector, pin contacts
pin signal- and
short
designation
input / output explanation
1EXT_IRQ_IN
(EX-IRQ-I) TTL-input (1) edge-triggered external interrupt request input:
event-buffered (flip-flop), request may be routed to PC
interrupt request or polled
(2) alternatively for use as universal digital input
2VCC_BLITZ_
EXT
(VCC_BLZ)
flash trigger
voltage input input for the trigger voltage for flash control output
3EXT_SCANTRI
G_IMP
(STSCA7#)
TTL input
trigger input for scan triggering
by hardware upon rising edge (pulse input);
Remark: period must be selected longer than the
programmed integration time + read-out time to assure
not to start a new scan cycle before the previous cycle is
completed.
4EXT_SCANTRI
G_FLANKE
(STSCAN8#)
TTL input (1) Trigger input for scan triggering by hardware upon
arbitrary edge (each edge triggers one scan, for typical
application with chopper-synchronous scan)
Remark: The time between two edges must be selected
longer than the programmed integration time + read-out
time to assure not to start a new scan cycle before the
previous cycle is completed.
(2) alternatively for use as universal digital input
5LIGHTOUT TTL or
UVCC_BLITZ_
EXT
output
(1) pulse output (single shot) for flash control (level TTL
or UVCC_BLITZ_EXT ), active high or active low, to be
triggered either
(1a) in mode of operation 'software flash' under PC-
control or
(1b) in mode of operation 'hardware - flash' by the EOS
signal preceding the data scan (triggered by hardware at
the start of the integration period before each data scan)
(2) alternative for use as digital output, level TTL or
UVCC_BLITZ_EXT
65V_OUT
supply
voltage
output
+5V supply output for connection of peripheral
components (e.g. shutter), IMAX = 500mA, fuse SI1 on
the Interface Board
7alternative
PIXEL_1
or
SHUTTER_R
(1PX/SH_R)
(TTL output
with RV= 100
Ohms)
(1) trigger output, pulse (active high) during read-out of
the first pixel of the photodiode array (solder bridge BR6
in position 2-3)
(2) alternatively for use as digital output, e.g. as
direction signal for shutter (solder bridge BR6 in position
1-2 = Default setting)
8SHUTTER_EA
(TTL output
with RV= 100
Ohms)
Digital output, for use e.g. as input-output switching
signal for shutter control
9GND ground
PC Interface Electronics PD-ISA16V3 Technical Documentation V3.21_E
tec5 AG Page I 20 / 27
I.7.3 Connector J2 (Service Connector)
Connector type: socket connector, pin contacts
pin number signal designation explanation
1STSCAN6# start pulse for read-out of the array
2SCANRUN read-out of the array running
3CLK clock signal
41PIXEL#1 identification signal 1st pixel of the array
5EOS# read-out of the array completed
6STOR-E3# enable data storage
(internal importance only)
7BYTE toggle signal LSB/MSB for the ADC
8W-CTL-C1 control word write signal
9STSCAN1# start scan 1, activates a scan cycle,
(control port output signal)
10 R-STS-C# status word read signal
11 STSCAN3# start scan 3, activates a scan cycle,
(integration timer output signal)
12 R-FIF-C# read signal FIFO
13 BUSY ADC converting
14 EMPTY# FIFO empty
15 GND ground
16 HALF# FIFO half full
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