Novatek NT93403-05X User manual

NT93403-05x
PRELIMINARY Multi-Feature Phone LSI With LCD Driver
1
Features
4-bit CMOS
nThe NT93403-05X is a multi-feature tone/pulse dialer
based on a CMOS 4-bit single chip microcomputer
with 5120 X 10 bit ROM and 1204 X 4 bit RAM
capacity
nBuilt-in LCD driver and direct interface with 16-
digit LCD display
Dialing
nDialing parameters are set by external diodes and
the SELECT pin
nBuilt-in high-precision dual-tone multi-frequency
(DTMF) generator and on-chip pulse dialer
nSwitchable tone/pulse dialing
nDialing speeds of 10 or 20 pps and Make/Break Ratio
of 40/60 or 33/67
nNormal or Sweden/Denmark modes for number of
pulses selectable
nMinimum DTMFsignal duration/separation guaranteed
nChain dialing
nManual dialing will execute as many digits as entered
nRedial function (up to 48 digits)
Long distance control
nThree long distance control functions are available:
(1) Key Lock: The chip will detect the key lock status
(2) Pass Code: The chip will check pass code.
(pass code replaces key)
(3) Key and pass code
nWith the diode setting, three defaults can be chosen:
0,168
nThree-digit restriction codes are user-programmable
nFor restriction dialing, "0" and "168" can be restricted
simultaneously
nComplete and strict restriction dialing function. For
example, "pause" key + "0" key will not dial out for "0"
restriction dialing
n"SOS" key is provided for forgotten pass codes,
which when depressed, automatically resets to 000
Memory
n13 24-digit memory locations: 3 direct and 20 indirect
memories
n3 single button dialing memories
nOne-touch auto-dialing and abbreviated dialing
n"MEM"key used for abbreviated dialing
n"EM1", "EM2" and "EM3" memory locations are
provided
Pause, Flash, Hold, Mute, P/T
nPause time programmable from 1 to 5 seconds
(1 second resolution) by key entry
nFlash time programmable from 90, 100 msec to 900
msec (100 msec resolution) by key entry
nManual HOLD key controls HOLDOUT signal. Hold
mode can be released by HOLDIN input pin
nHOLD LCD indicator (blinking) and HOLDOUT for
music during hold
nManual MUTE key controls XMUTE signal
nPulse to tone key function
Other Features
n5 sets of the last dialed phone numbers (up to 24
digits) and dialing time (mm-ss)
nLCD self testing function
nCalendar and real time clock display with 12-hour
format and AM/PM indicator
nKey-in tone output for valid key data
nError display and error beep sounds when sequence
is entered incorrectly
nSpeaker phone control output and LED control pin
are provided
nReset pin provided
n5 X 7 matrix keypad interface
nOperating Voltage Range: 2.5V - 5.5V

NT93403-05X
2
General Description
NT93403-05X is a CMOS, silicon integrated circuit
designed for multi-feature phones. This LSI provides
the following functions: one-touch/abbreviated dialing,
message function, redial, programmable flash, pause,
lock, password, key-in tone, hold, and mute. The device
also includes a DTMF generator, on-chip pulse dialer,
LCD drive/controller and a 32 kHz watch oscillator
circuit.
Pad Configuration
NT93403-05x
3 2 68 671 76 75 74 73 72 71 70 69 66 80 79 78 77 65 64
8
7
6
5
4
13
12
11
10
9
18
17
16
15
14
23
22
21
20
19
24 25 39 40
26 31 32 33 34 35 36 37 38 4127 28 29 30 42
63
43
48
49
50
51
52
44
45
46
47
58
59
60
61
62
53
54
55
56
57
TONEOUT
SELECT
NC
SPKCTL
NC
NC
NC
NC
NC
X1
X2
GND
NC
NC
NC
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG11
SEG12
ROW4
NC
ROW3
ROW2
XMUTE
MUTE SEG13
NC
COL5 COL3 COL2
COL1/HOLDIN
ROW6
ROW5/HOLDOUT
HS
ROW1
SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9
SEG10
PULSEOUT NC NC NC RESET OSC2 OSC1 VDD COL4 TONE TEST
NC
NC VLCD COM4 COM3 COM2 COM1
SEG32
Keyboard Configuration
COL1 COL2 COL3 COL4 COL5
1 2 3 EM1 CLOCK ROW1
4 5 6 EM2 TIMER ROW2
7 8 9 EM3 NOT USED ROW3
*/TONE/AM 0#/LOCK/PM NOT USED UP ROW4
MEM PAUSE FLASH NOT USED DOWN ROW5
REDIAL HOLD STORE LD NOT USED ROW6
PASSWORD MUTE SPEAKER TONE NOT USED GND

NT93403-05X
3
Key Description
Key Name Description
0 - 9 Number key
*/TONE/AM S key, Pulse →Tone change key,and AM key
#/LOCK/PM # key, Lock number setting key,and PM key
MEM Abbreviated memory location key
PAUSE Pause key
FLASH Flash key
REDIAL Redial and one-key redial key
HOLD Hold key
STORE Store key
PASSWORD Password setting key
MUTE Mute control key
SPEAKER HANDS-FREE mode key
EM1, EM2, EM3 One-touch emergency recall key
LD Line disconnect key
CLOCK CLOCK KEY
TIMER Stopwatch Start/stop Key
UP Up searching key for 5 last sets of dialed numbers and
time
DOWN Down searching key for 5 last sets of dialed numbers
and time
TONE Pulse →Tone change key

NT93403-05X
4
Pin Description
Pin No. Symbol I/O Description
1NC No Connection
2PULSEOUT ODial pulse output
3TONEOUT OKey-in tone, error beep and confirmation beep output. Key-in tone is
875Hz and sends output for about 60 msec
4SELECT OTONE/PULSE dialing, FREE/LOCK, 10 pps/20 pps, Make/Break ratio,
Flash time, Message Function enable/disable select pin
5NC No Connection
6SPKCTL OHook switch control. Normal low
When message function is active, this pin will go high to connect line
Speaker phone on: high
Speaker phone off: low
HS pin high →low: low
7 - 10 NC No Connection
11 NC No Connection
12 ROW4 OKeyboard interface
13 NC No Connection
14,15 X1, X2 Watch oscillator input . A 32768Hz crystal is used
16 GND Ground
17 ROW3 OKeyboard interface and LED driver
18 ROW2 OKeyboard interface pin
19 XMUTE OXMute Output. Controls microphone circuits of voice network
20 MUTE OMute Output. Controls UM5110 AUD. (See Interface Circuits)
Active low during tone or pulse dialing
21 - 24 NC No Connection

NT93403-05X
5
Pin Description (continued)
Pin No. Symbol I/O Description
25 COL5 IKeyboard interface
26 COL3 IKeyboard interface
27 COL2 IKeyboard interface
28 COL1/HOLDIN IKeyboard interface and hold release input
29 ROW6 OKeyboard interface
30 ROW5 /HOLDOUT OKeyboard interface and hold control output
31 HS IHook switch input
Low: off hook High: on hook
32 ROW1 OKeyboard interface
33 - 64 SEG1-32 OLCD interface
65 - 68 COM1-4 OLCD interface
69 VLCD IPower supply for LCD driver. Should be floating
70, 71 NC No Connection
72 TEST IConnect to VDD in normal operation
73 TONE ODTMF signal output
74 COL4 IKeyboard interface
75 VDD Power supply (2.5 V - 5.5 V)
76
77 OSC1 OSC2 System Clock Oscillator input A 3.5795 MHz crystal is used
78 RESET IResets the LSI. High active
79 NC No Connection
80 NC No Connection

NT93403-05X
6
nParameter Selection
Parameter selection is accomplished using the SELECT pin, by connecting the SELECT pin through a diode to the
column pins (COL1 -COL5 ) and row pins (ROW1 - ROW6 ). Parameters may be selected. The following table shows
the parameter selection.
COL1 TONE/PULSE SWITCH SELECT
SELECT
KEY LOCK SWITCH
COL2
COL3
ROW1
ROW2
SELECT
SELECT
SOS KEY
SELECT
JP3
JP4 SELECT
JP5 SELECTROW3
ROW4 JP6
JP7 SELECT
JP8 SELECT
ROW5
ROW6
OPENED : Tone Dialing
CLOSED : Pulse Dialing
OPENED : Free Dialing
CLOSED : Key Locked (Restriction dialing)
OPENED : PASSWORD SETTING DISABLE
CLOSED : SET PASSWORD TO 000
OPENED : Restriction no. "168" off
CLOSED : Restriction no. "168" on
OPENED : 40/60 MBR
CLOSED : 33/67 MBR
OPENED : 10 PPS
CLOSED : 20 PPS
OPENED : 600 ms
CLOSED : 100 ms
OPENED : N PULSES
CLOSED : N + 1 PULSES
OPENED : PAUSE TIME = 2 SEC
CLOSED : PAUSE TIME = 4 SEC
Note: If user wants to change the setting values of ROW1 - ROW6 , NT93403-05X must be reset again.

NT93403-05X
7
LCD Connection and Format
nLCD connection
The LCD should be operated on 1/4 duty and 1/3 bias. Examples of LCD connection are given as follows:
16-DIGIT LCD
R1 VDD
VLCD
VA
VB
GND
r
r
r
VDD COM1,2,3,4
SEG1~SEG32
UM93403-05
4
32
1/4 DUTY, 1/3 BIAS DRIVE
R1 = 50K Ω − 200K Ω
r = 150K Ω
Since large LCD panels need a large driving current, it
is possible the internal dividing resistor circuit cannot
provide the correct bias voltage. In this external
resistors can solve this problem.
However, small external resistors result in more power
dissipation. Hence external resistors must be
experimentally determined. Also, R1 should be
experimentally determined.
VLCD = driving voltage of LCD = r r r
R1 r r r
+ +
+++ x VDD
NT93403-05X LCD Format

NT93403-05X
8
If the HOLD indicator is not provided on the LCD, HOLDOUT pin can be used to drive LED as HOLD indicator.

NT93403-05X
9
LCD Display Dot Format
LCD SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12
COM1 f1 a1 f2 a2 f3 a3 f4 a4 f5 a5 f6 a6
COM2 g1 b1 g2 b2 g3 b3 g4 b4 g5 b5 g6 b6
COM3 e1 c1 e2 c2 e3 c3 e4 c4 e5 c5 e6 c6
COM4 d1 -d2 AM d3 -d4 PM d5 -d6 STORE
LCD SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22
COM1 f7 a7 f8 a8 f9 a9 f10 a10 f11 a11
COM2 g7 b7 g8 b8 g9 b9 g10 b10 g11 b11
COM3 e7 c7 e8 c8 e9 c9 e10 c10 e11 c11
COM4 d7 -d8 MTE d9 -d10 - d11 -
LCD SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 SEG32
COM1 f12 a12 f13 a13 f14 a14 f15 a15 f16 a16
COM2 g12 b12 g13 b13 g14 b14 g15 b15 g16 b16
COM3 e12 c12 e13 c13 e14 c14 e15 c15 e16 c16
COM4 d12 -d13 HOLD d14 SPK d15 -d16 -
f1 ~ 16 a1 ~ 16
c1 ~ 16
g1 ~ 16
d1 ~ 16
LCD DIGIT1 ~ 16
e1 ~ 16
b1 ~ 16

NT93403-05X
10
Block Diagram
OSCILLATOR
CIRCUIT
SYSTEM
CONTROL
CIRCUIT
DTMF GENERATOR
UM93403-05X DTMF TONE
TEST
RESET
GND
VDD
SEG1~SEG32
COM1~COM4
HS
PULSEOUT
MUTE
XMUTE
SPKCTL
SELECT
TONEOUT
LCD
DRIVER/
CONTROLLER
OSC1
OSC1
HOLDOUT/HOLDIN
ROW1-6
COL1-5
I/O
PORT
Functional Description
Real Time Clock
nAfter power-on reset, the LCD will display all the
segments for one second and then return to NORMAL
CLOCK mode.
nDuring normal conditions, the display shows month,
date, hour, minute, and second. (phone number is
displayed upon digit entry or corresponding set mode
information is displayed).
nReal time can be displayed whenever "CLOCK" key is
depressed.
nReal time clock setting procedure
1. Press "STORE" key.
2. Press "CLOCK" key.
3. Enter month, date, AM/PM, hour, minute. (Use */#
for AM/PM and 01:00~12:59 for hour & minute).
4. Press "STR" key once again. (Seconds start from
00)
5. Blinking cursor on the position for digit entry is
provided.
6. Key entry must be 2 digits. (ie: 03 for March).
7. If setting is interrupted half way, previous time will
be displayed.
8. If any key is incorrectly entered, the key is ignored.
9. If real time clock is not set after power-on reset,
clock display will blink. (Pressing "CLOCK" key can
stop this blinking).
MONTH DAY HOUR MINUTE
STORE AM PM
Stopwatch
nStopwatch timer is provided up to 59 minutes and 59
seconds.
nDisplay shows minutes and seconds at month/date
display location.
nTimer will stop by either going on-hook or by
depressing "TIMER" key once.
nTimer start/stop procedure
1. Press "TIMER" key to start. The real time will
change to 00-00 and start counting.
2. Real time will be displayed at this time, but only
month and date will be replaced by timer.
3. Press "TIMER" key once again to stop timer.
(display stays approx. 10 seconds after stop and
returns to month and date automatically).
4. Timer display can be forced to return to date and
month by touching "CLOCK" key once.
nAuto Start-watch
1. Lift the phone off the hook, or press the SPEAKER
key.
2. Enter desired number from the keypad if necessary.
3. After 6 seconds, the timer will start counting from
00-00.
4. Hang up the telephone by handset or SPEAKER
key to stop the timer counting. The display will hold
TIMER mode about 10 seconds and return to
CLOCK mode automatically.
MIN. SEC. REAL TIME
PM
STOP WATCH