Ice-Tech POD-51EH-C541U-12 User manual

• www.icetech.com • © Copyright ICE Technology
POD–51EH–C541U–12
ANB
FLF
EMUL
MCU
C541U
NOHAU
Corporation
XL0
XL1
XL2
XL3
XL4
XL5
XL6
XL7
123
EA
ALE
PSEN
JP1
123 XH0
XH1
XH2
XH3
XH4
XH5
XH6
XH7
X1S
3
2
1
T
USL
3
2
1
T
X2S
3
2
1
T
1 2 3 T
JP10
P3.6 P3.7
JP7
JP2
G
MERR
RY
PWD
Y
IDL EML
Y
MON
R
RST
P1
P3
7
6
5
4
3
2
1
0
USB
FULL
3
2
1
D P
D M
Figure 1. POD–51EH–C541U–12
Operating Instructions
The POD–51EH–C541U–12 supports the Siemens C541U controller which is based on the
C500 core.
This pod is supported by the EMUL51–PC Windows software version 2.1M or later. To work
with this pod, you need to choose processor C541U in the Hardware Configuration window.
The EPROM on the emulator board must be version COM 1.4 or later. If it is an older version,
you need to replace it with a newer EPROM.

POD–51EH–C541U–12 • © Copyright ICE Technology 2
The pod assembly consists of two sub-assemblies. The universal Port Replacement Unit (PRU)
is the larger board that carries the small Processor Module (PM) daughterboard.
The PRU has three headers on the bottom that carry the signals to the target. The PRU also has
a 50-pin header J1 that connects through the ribbon cable to the emulator board.
The target headers plug into an adapter that you select depending on the type of the controller.
For example, the C541U microcontroller uses the Emulation Solutions 180–3900–00
(PLCC–44) adapters.
This adapter plugs into the target system, replacing the C541U controller IC. You can order this
adapter from Nohau Corporation or directly from Emulation Solutions.
The POD–51EH–C541U–12 runs up to a maximum frequency of 12 MHz.
The EA pin during reset signal rise (also sampled on internal watchdog timer reset) selects the
active mode. It is recommended that you connect this pin to either constant low or constant
high. This pin defaults to high (selecting single-chip mode), that is implemented by a 22K pull-up
resistor on the pin.
POD–51EH–C541U–12 has two operating modes.
•Single-chip
•Expanded
The active mode is selected by the EA pin during reset signal rise (also sampled on internal
reset).
When using expanded mode, the code memory can be mapped either to the target or the emu-
lator (with boundaries of 4K). In expanded mode, addresses are seen on the Port2 and Port0
adapter pins for every bus cycle regardless of where it is mapped. The data, however, is read
or written to the Port0 pins only for addresses that are mapped to the target.
When using single-chip mode, you need to map all code memory to the emulator board. In this
mode, Port2 and Port0 can be used as I/O ports.
Jumpers
VCC SeLect (VSL): Controller VCC Source Select
This jumper selects how to power the VCC pins of the controller. When the jumper top is
on pins 1 and 2, the controller VCC pins are connected to the VCC of the emulator. When the
jumper top is on pins 2 and 3, the controller VCC pins are connected to the VCC pins of the
adapter. This allows the controller VCC pins to be powered by the target. The default position of
the jumper top is across pins 1 and 2 (emulator selected as VCC source).

POD–51EH–C541U–12 • © Copyright ICE Technology 3
Note: Taking power from the target system is not recommended.
Note: Both VCC pins of the controller are shorted together.
USB Power Select (USL): VCCU Source Select
This jumper selects how to power the VCCU pin of the controller. When the jumper top is across
pins 1 and 2, VCCU is connected to the VCC of the emulator. When the jumper top is across
pins 2 and 3, VCCU is connected to the target VCC through the adapter. The letter T, to show
connection to the target, marks pin 3 of the jumper. The default position of the jumper top is
across pins 1 and 2 (emulator selected as the voltage source).
USB Data Line Pull-up Resistor Select
This jumper selects which of the D+ and D- USB data lines connect to the 1.5 kOhm pull-up
resistor tied to the 3.3-V source determined by the USB speed mode. This jumper is used only
when the target pull-up is not supplied, or when the emulator is not connected to the target, and
the USB plug on the emulator is connected by DP and DM jumpers. When the device is in
USB full speed mode, the jumper top needs to be across pins 1 and 2. When the device is in
USB low speed mode, the jumper top needs to be across pins 2 and 3. This jumper is off by de-
fault.
DP, DM: Connection of the Emulator USB Plug
When the DP and DM jumpers are on, the D+ and D- USB data line of the controller is con-
nected to the USB series B plug on the emulator. These two jumpers are off by default.
X1S, X2S: XTAL1 and XTAL2 Source Select
These two jumpers select the clock source for the controller. With the jumper tops on pins 1
and 2, the controller XTAL1 and XTAL2 pins are connected to a 24-MHz crystal on the pod.
When these two jumpers have jumper tops on pins 2 and 3, the controller XTAL1 and XTAL2
pins are connected to pins 37 and 36 of the adapter. This allows the target to supply the clock to
the controller XTAL1 and XTAL2 pins. The default position of the jumper top is across pins 1 and
2 (the pod crystal).
Note: Both of the jumper tops need to be placed in the same position with either both
selecting the pod crystal source, or both selecting the target clock source.
JP8: Monitor Stop/Break Select
This jumper determines whether all or only part of the internal MCU peripherals stop in monitor
mode after an emulation break occurs. When the jumper top is out, the STOP mode is
selected. In this case, all of the internal MCU peripherals are stopped in monitor mode. This in-
cludes the following controller peripherals.
•Interrupts

POD–51EH–C541U–12 • © Copyright ICE Technology 4
•Watchdog timer
•Oscillator watchdog
•Timer0
•Timer1
•SSC
When the jumper top is on, the BREAK mode is selected. In this case, only some of the internal
peripherals are stopped. This includes the following controller peripherals.
•Interrupts
•Watchdog timer
•Oscillator timer
Timer0, Timer1, and SSC are not stopped in this mode.
In STOP and BREAK, all of the internal peripherals start working from the same point they
stopped before the break as soon as the user program starts running again when you press the
GO or STEP buttons. When changing this jumper, the new STOP/BREAK mode takes effect
after the next RESET sequence. The default setup of the jumper is STOP mode selection (jumper
top out).
Note: It is recommended to work in STOP mode only. The break mode needs to be se-
lected only if your application has limitations that do not allow the timers to be
stopped in monitor mode.
XL0..XL7: Port Select Jumpers
These eight 3-pin jumpers select the signals that are routed to the trace board and are shown in
the trace window under the header P1. For any jumper in this group the jumper top position pin
2–pin 3 means that the corresponding pin of the recreated Port0 is traced. Pin 1 of each jumper
is left free and can be connected to any signal on the target or port headers on the pod. For ex-
ample setting XL4 in position 2–3 means that pin P0.4 is traced. If pin XL4.1, for
example, is connected to a signal P4.3 on the target, you can choose between tracing signal
P0.4 or P4.3 by moving the jumper between positions 2–3 and 1–2.
XH0..XH7: Port Select Jumpers
This group of jumpers is similar to XL0..XL7 except pin 3 of each jumper is connected to the
recreated Port2 and pin 1 is left free.

POD–51EH–C541U–12 • © Copyright ICE Technology 5
JP7 (External Code Enable)
This jumper enables access to the external code if the single-chip mode is emulated and part of
the code is mapped into the target code memory. The external code is enabled if the jumper top
is out.
Reset Button
When pressed, this switch resets the pod (including the controller). You can use this button to
recover from a map error status. (See the following “Map Error LED” section.)
Reset LED
The Reset LED (red LED) is turned on whenever the microcontroller reset is active. There are
five possible sources of the controller reset.
1. Reset from the target starts whenever a low level is detected on the reset pin of the
adapter.
2. Reset from the S1 button starts by pressing the S1 button on the pod.
3. Reset from the emulator starts by clicking the reset button in the user interface
EMUL51–PC Windows software.
4. Reset from the internal watchdog timer starts if the internal watchdog is enabled, and the
user software does not feed it for a long period.
Note: It is important to feed the watchdog periodically, otherwise, problems during the
debug process might occur.
5. During hardware power-down initiated by a low level detected on pin 69 (HWPD) of the
target adapter.
6. When a map error occurs. (See the following “Map Error LED” section.)
During all of these reset sequences, the reset LED is turned on for a short or long period
depending on the sequence).
Map Error LED
This red LED signals a mapping error occurring in this situation. The EA pin from the target
(during the last reset) selects single-chip mode, a code memory address range is mapped to the
target, and there is code access to one of the addresses in this range. This state is illegal. In sin-
gle-chip mode all of the code memory needs to be mapped to the emulator and not to the target,
because the 64K code memory is internal to the C541U controller.
If this illegal state occurs, the Map Error LED turns on simultaneously with the C541U control-
ler entering the reset state, signaling the illegal state. This state is maintained until you push the
reset button. Leaving the map error state is done only by pressing the reset button S1 on the
pod. This prevents repetitive occurrences of the illegal state until you fix the problem.

POD–51EH–C541U–12 • © Copyright ICE Technology 6
Emulation LED
The Emulation LED (green LED) turns on whenever the user program is running, and turns off
whenever the user program is stopped (emulation break). The user code can be fetched from
RAM on the emulator board or from code memory on the target (usually PROM).
Monitor LED
The Monitor LED (yellow LED) turns on whenever the monitor mode is active. In this mode, the
controller executes internal emulator code that communicates with the host PC. The emulator
enters this mode upon power-up or after emulation break.
Headers
JP10: SY0, SY1
This header contains two pins: Pin 1 (SY0), and pin 2 (SY1). These two signals are carried to
the emulator and trace boards, and can be used in the trace and breakpoint logic.
JP9: EMUL, FLF, ANB
This header contains three pins: Pin 1 (EMUL), pin 2 (FLF), and pin 3 (ANB). Pin1 signals emula-
tion or monitor mode. It is low when emulation is active (when the user program is running).
Pins 2 and 3 are not used currently, but can be used in the future.
J2: P3.6, P3.7
This header carries the recreated signals: P3.6/WR (pin J2.1) and P3.7/RD (pin J2.2). These
pins observe the signals or route them to the trace board through the headers XL0..XL7,
XH0..XH7.
JP1: EA, ALE, PSEN
This header carries the signal listed previously and is used for testing, or can be connected to
the trace board through the headers XL0..XL7, XH0..XH7.
P1, P3: Port Headers
These headers carry signals for the corresponding ports. The port pin numbers are marked on
the silk-screen. For example, pin 5 of header P3 connects to pin P3.5 of the microcontroller.
Differences Between the Emulator and the C541U Microcontroller
The EA Pin—The EA pin is an input pin that during reset, is sampled by the controller in
order to select between single-chip mode (program in internal ROM) and expanded mode (pro-
gram in external memory). This input pin on the controller floats, meaning it does not have a
pull-up or pull-down resistor. On the pod a 22K pull-up resistor connects to this pin to select a

POD–51EH–C541U–12 • © Copyright ICE Technology 7
default state of single-chip mode when the target does not force this pin. This difference must
be taken into account if the target pin is tied to a pull-down resistor. A sufficiently low pull-
down (1.5K or lower) is required to overcome the 22K pull-up resistor on the pod.

POD–51EH–C541U–12 • © Copyright ICE Technology 8
Port0 and Port2 Pins—The pod emulates these 16 port pins, used as the address/data bus and
as port pins. These pins have slightly different AC and DC characteristics from the Port0 and
Port2 pins of the controller. These pins sink up to 12 mA and source up to 4 mA, while main-
taining valid TTL output logic levels. Port2 pins also have pull-up resistors of 22K, which might
be different from the controller internal pull-ups.
Connecting the Pod to a Target System
1. Make sure the power is turned off in both the host PC and the target system.
2. Connect the black EZ-hook from the pod to the target GND.
3. Turn on the power to the PC first, and then turn on the power to the target.
4. When turning the power off, turn off the target power first, and then turn off the PC power.