Sony IT-M708 User manual

4 Line-Phone for SOHO
NEW TECHNICAL THEORY
FOR SERVICING
IT-M704/M804
OPERATION MANUAL
Internal use only

CONTENTS
1. Out Line of IT-M704/M804....................................................................................................3
1-1. Feature..........................................................................................................................3
1-2. Feature List...................................................................................................................4
1-3. External appearance & LCD Layout...........................................................................7
1-4. LCD Specifications.......................................................................................................9
1-5. System Organization....................................................................................................9
2. Specification...........................................................................................................................11
3. BlockDiagram.........................................................................................................................14
4. Maincomponent (Semiconductor)........................................................................................14
5. Board Structure......................................................................................................................15
6. Explanation of the Circuit.......................................................................................................16
6-1. Main CPU .....................................................................................................................16
6-2. I/F for telephone line.....................................................................................................26
6-3. Speech Net Work (N/W)..............................................................................................30
6-4. Speaker Phone ............................................................................................................31
6-5. Control Data Transmission Circuit..............................................................................32
6-6. Extension Call Circuit...................................................................................................33
6-7. Caller-ID Circuit.............................................................................................................36
7.Regulation...............................................................................................................................39
Attached -1Block diagram........................................................................................................40
2

1. Outline
IT-M704/IT-M804 is 4 Line-Phone for SOHO (Small office Home Office) that at
most 16 telephones can be used via 4 lines.
IT-M704 is low-end model that JOG DIAL and CALLER ID function is removed
from IT-M804. IT-M704/M804 is for North America.
1-1. Feature
1. It is possible for each phone to dial, receive, and hold by using one of 4 lines.
2. Each telephone controls each other by data communication using carrier out of
audio frequency range of LINE 1.
3. It is possible to make an extension call between each telephone on each line using
carrier out of audio frequency range of LINE 1.
4. SPEAKERPHONE can be used on both outside line and extension line.
5. It is possible to transfer outside line to each telephone on each line.
6. It is possible to make a conference call by three persons.
7. Busy Redial and Visual Message Waiting operation by Stutter Tone is possible
because each phone has TONE detection circuit.
8. 3-row LCD is attached on IT-M804 and 1-row LCD is attached on IT-M704.
9. Data port/jack is attached (choose the line among LINE 2 -LINE 4 by switch)
10. CALLER-ID, CALL-WAITING and VISUAL MESSAGE WAITING functions are
attached on IT-M804.
Only VISUAL MESSAGE WAITING function is attached on IT-M704.
11. Phone Directory, Speed Dial, Caller ID List is equipped on IT-M804.
Only Speed Dial is equipped on IT-M704.
12. JOG DIAL is equipped on only IT-M804.
13. HEAD SET jack is equipped.
14. Depending on 9 volt battery 6F22(006P), it is possible to make a call for 30 minutes
after power cut.
Phone Directory Speed Dial Caller ID List
IT-M804 100(max) 16 200
IT-M704 -28 -
3

1-2. Feature List
General
IT-M804 IT-M704
Type Corded Corded
LINE 4Line 4Line
Power Supply AC Adapter AC Adapter
Station Capability 16 16
LCD Display ○(3-row) ○(1-row)
Time/Day Indicator ○(On Idle) ○(On Idle)
Dialing Monitor ○○
Call Timer ○○
Jog Dial ○-
Back-up Battery 9V Battery 6F22(006P) 9V Battery 6F22(006P)
Back-up Memory EEPROM USE EEPROM USE
Wall Mountable ○○
Intercom/ Paging/Transfer One line (on LINE 1) One line (on LINE 1)
Multi-Language ○(Spanish) ○(Spanish)
Visual Message Waiting ○(LED)/(LCD)
Stuttered Dial Tone (Stutter
signaling) & FSK
○(LED)/(LCD)
Stuttered Dial Tone (Stutter
signaling) only
Caller ID Section
IT-M804 IT-M704
Jog Dial ○-
Caller ID with Call Waiting ○-
Caller Name on Display ○-
Memory Match Ring ○-
Caller ID LIST ○(100) -
Dial from CID Data ○-
All / Individual Delete ○-
New Call Indicator ○(LED) -
4

Telephone Section
IT-M804 IT-M704
Line Status Indicator
Back light key (orange) Back light key (orange)
Conference ○(LED) ○(LED)
Busy Redial ○(LED) ○(LED)
Do Not Disturb Function ○(LED) ○(LED)
Intercom ○(LED) ○(LED)
Page (Station Page) ○○
All Page ○○
Call Transfer ○○
Data jack Capability ○
(Choose LINE2 –LINE4) ○ (choose LINE2 –LINE4)
Speakerphone ○(LED) ○(LED)
Speakerphone Volume ○
16 steps by S/W control ○ 16 steps by S/W control
Speed Dial ○(16 Name) ○(28)
Lower Key ○(LED) ○(LED)
Hold ○(Line LED Flashing) ○(Line LED Flashing)
Muting ○(LED) ○(LED)
Redial/Pause ○○
Flash/Call Waiting ○○(Flash)
Program ○○
Handset Volume ○
3 steps by S/W control ○ 3 steps by S/W control
Ringer Volume ○
4 steps by S/W control
(High, Mid, Low, Off)
○
4 Steps by S/W control
(High, Mid, Low, Off)
5

KEY & LED IT-M804 IT-M704
KEY LED KEY LED
LINE1 SELECT ○○(Orange) ○○(Orange)
LINE2 SELECT ○○(Orange) ○○(Orange)
LINE3 SELECT ○○(Orange) ○○(Orange)
LINE4 SELECT ○○(Orange) ○○(Orange)
CONFERENCE ○○(Red) ○○(Red)
HOLD ○○
(LINE LED flash) ○○ (LINE LED flash)
REDIAL/PAUSE ○- ○-
FLASH/CALL WAITING ○- ○-
DO NOT DISTURB ○○(Red) ○○(Red)
MUTING ○○(Red) ○○(Red)
SPEAKER PHONE ○○(Green) ○○(Green)
PROGRAM ○- ○-
SPEED DIAL ○(16) - ○(28) -
LOWER ○○(Red) ○○(Red)
12KEY ○- ○-
JOG DIAL ○- - -
ERASE/CLEAR ○- - -
BUSY REDIAL ○〇(Red) ○○(Red)
INTERCOM ○〇(Red) ○○(Red)
TRANSFER ○- ○-
PAGE ○- ○-
ALL PAGE ○- ○-
NEW CALL INDICATOR - 〇(Red) - -
Visual Message
Waiting - 〇(Red) - ○(Red)
VOLUME +/- ○- ○-
JACK IT-M804 IT-M704
LINE1/2 ○(4pin) ○(4pin)
LINE3/4 ○(4pin) ○(4pin)
DATA ○(2pin) ○(2pin)
HANDSET ○(4pin) ○(4pin)
HEADSET ○(3pin) ○(3pin)
POWER ADAPTER ○(12V/200mA) ○(12V/200mA)
6

1-3. External appearance & LCD layout
IT -M804
Back Light LED is used on LINE 1-4 and LOWER keys.
7

IT-M704
Back Light LED is used on LINE 1-4 and LOWER keys.
LCD LAYOUT PLAN
LINE1 LINE2 LINE3 LINE4
PAGE
CPX-957
ALL PAGE
PROGRAM
INTERCOM






CONF TRANSFER HOLD
VOLUME
REDIAL/PAUSE



BUSY
REDIAL



MUTING



DO NOT
DISTURB



SPEAKER
PHONE
4-LINE TELEPHONE IT-M704
LOWER
+
-
123
6
5
4
9
8
7
#
0*
MIC
Message

ERASE/CLEAR FLASH
HEADSET
+
_
TONE
MESSAGESLINE1 LINE2 LINE3 LINE4
8

1-4. LCD specifications
liquid crystal STN
Indication POSITIVE
lightning system reflection
visual angle 6:00
drive Dynamic 5.2V 1/16 Duty 1/4 Bias
IT-M804 34 x 65 mmExternal form
size IT-M704 20 x 65 mm
IT-M804 24 x 60 mmView Area IT-M704 12 x 60 mm
Character size Dot Character 3.1 x 6.1
Connection By conductive rubber connector
CONTACT PITCH 0.75mm/0.8mm
1-5. System organization
Each phone uses out of audio frequency range of Line 1 and controls data and
makes a extension call.
System organization chart
9

Spectrum structure of Line 1
Control data: ASK modulation by On and OFF of 450 KHz carrier
Data transmission speed: 780bps
Extension call: AM modulation, dial side 281.25KHz, receiving side 321.43KHz
Compander IC is equipped for improving better calling quality.
note
ASK: Amplitude Shift Keying
Spectrum of Line-1
０．３KHz 3.4KHz 281.25KHz 321.43KHz 450.KHz
Voice Base band Voice carrier of
caller side for the
extension call
Voice carrier of
receiver side for
the extension call Control signal
carrier
10

2. SPECIFICATION
TELEPHONE SECTION SPECIFICATION
No ITEM UNIT MIN TYP MAX CONDITION
H/S 100 300 5001OFFHOOK DCR SPK
Ω 100 300 500 20mA DC
2ONHOOK DCR M
Ω 12 19 -100V DC
3RINGER IMPEADANCE K
Ω 30 60 -75V AC 20Hz
300Hz 250 400 600
1KHz 350 600 900
1.5KHz 350 600 900
4AC IMPEADANCE
3.4KHz
Ω
350 600 900
30mA DC
SPEED PPS 810 11 0Kf Length
MAKE RATIO %38 40 42 DIAL 0
5DP
MIN PAUSE mS 750 800 850
LOW 927 940 955#HIGH 1455 1477 1499
LOW 840 852 8648HIGH 1316 1336 1356
LOW 759 770 7814HIGH 1191 1209 1227
LOW 687 697 707
FREQ
1HIGH
Hz
1191 1209 1227
30mA DC
LOW -9-6-3LEVEL *HIGH dBm -7-4-130mA DC
SIGNAL DURATION mS 60 80 100
INT.DIGITAL INTERVAL mS 60 80 100
6TONE
CYCLE TIME mS 120 160 200
NOR 44
MID 37
RLR
HIGH 30
SLR -44
7RX/TX/SIDE TONE
LEVEL
(Sound Quality)
SiLR
dB
8
Measure by
BK
1 STEP -11 -51
2 STEP --7-
3 STEP --9-
8SPK OUTPUT
16 STEP dBV -30 -24 -18
INPUT
-30dBV
1KHz
LOAD：8 Ω
NOR -54 -48 -42
MID --41 -
HANDSET
HIGH -40 -34 -28
NOR -43 -37 -31
MID --30 -
9RECIVER
LEVEL
HEADSET
HIGH
dBV
-29 -23 -17
INPUT: 1KHz
-30dBV
HANDSET:
150 Ω
HEADSET:
32 Ω
11

HANDSET -26 -20 -14 1KHz, -40dBV
HEADSET -26 -20 -14 1KHz, -50dBV
10 TRANSMIT
LEVEL SPK
dBV
-26 -20 -14 1KHz, -50dBV
11 SIDE TONE HANDSET dB 8 - -70 1KHz, -40dBV
NOR position
12 BELL OPERATION VOLT(CONT) Vrms 30 35 39 BELL FREQ
: 20Hz
HIGH 70 75 80
MID 62 67 72
13 RINGER
LEVEL LOW
dBA
SPL 53 59 53
BELL FREQ
:20Hz, 75mV
14 CAS TONE DETECT LEVEL dBm -38 -32 -26
15 FSK DATA RECEIVE LEVEL dBm -46 -43 -40
16 CAS TONE DETECT TIME mS 75 80 85
17 STTUTER TONE DETECT LEVEL dBm -41 -36 -31
TERCOM SECTION TX SPECIFICATION
No ITEM UNIT MIN TYP MAX CONDITON
321.428KHz -28 -22 -161 TX CARRIER OUTPUT
LEVEL 281.25KHz dBV -28 -22 -16
321.428KHz - +/-200 +/-400
2 FREQUENCY
TOLERANCE 281.25KHz Hz - +/-200 +/-400
321.428KHz 40 46 -3 SUPRIOUS 281.25KHz dB 40 46 -
LOAD 135Ω
ΩΩ
Ω
321.428KHz 7.5 15 30
HANDSET 281.25KHz 7.5 15 30
INPUT : 1KHz
-40dBV
321.428KHz 7.5 15 30
HEADSET 281.25KHz 7.5 15 30
INPUT : 1KHz
-45dBV
321.428KHz 7.5 15 30
4 MODURATIO
N
SPK 281.25KHz
%
7.5 15 30
INPUT : 1KHz
-40dBV(continuous)
321.428KHz 2 4 8
HANDSET 281.25KHz 2 4 8
INPUT : 1KHz
-40dBV
321.428KHz 2 4 8
HEADSET 281.25KHz 2 4 8
INPUT : 1KHz
-45dBV
321.428KHz 2 4 8
5 TX
DISTORTION
SPK 281.25KHz
%
2 4 8
INPUT : 1KHz
-40dBV(continuous)
300Hz -9 -3 3
1KHz - 0 -
HANDSET
3KHz dB -1 5 11
INPUT : 1KHz
-40dBV
300Hz -9 -3 3
1KHz - 0 -
6 MODURATION
FREQUENCY
RESPONSE
(
321.428KHz) SPK
3KHz dB -1 5 11
INPUT : 1KHz
-40dBV(continuous)
12

INTERCOM SECTION RX SPECIFICATION
No ITEM UNIT
MIN TYP MAX CONDITON
321.428KHz -36 -301 RX
SENSITIVITY HANDSET 281.25KHz dBV -36 -30
MOD: 30%
S/N : 30dB
HANDSET - 3 6
HEADSET - 3 6
2 DISTORTION
SPK 321.428KHz % - 3 6
RF INPUT:-25dBV
MOD: 1KHz 30%
HANDSET -34 -28 -22
HEADSET -29 -23 -17
3 OUTPUT
LEVEL SPK 321.428KHz dBV -9 -3 3
RF INPUT:-25dBV
MOD: 1KHz 30%
H/S,HD/S VR:Max
SP VR: #8Position
300Hz -10 -4 2
1KHz - 0 -
HANDSET
3KHz -25 -19 -13
300Hz -10 -4 2
1KHz - 0 -
HEADSET
3KHz -25 -19 -13
300Hz -10 -4 2
1KHz - 0 -
4 AUDIO
FREQUENCY
RESPONSE
SPK
3KHz
dB
-25 -19 -13
RF INPUT:-25dBV
MOD: 30%
H/S,HD/S VR:Max
SP VR: #8Position
321.428KHz
OFF
HOOK 281.25KHz Ω
ΩΩ
Ω
321.428KHz
5
INPUT IMPEADANCE ON HOOK 281.25KHz Ω
ΩΩ
Ω300 500 700
CONTROL DATA SECTION SPECIFICATION
No ITEM UNIT
MIN TYP MAX CONDITON
1 TX CARRIER OUTPUT 450KHz dBV -28 -22 -16 LOAD 135 OHM
2 TX FREQUENCY TOLERANCE 450KHz Hz -200 0 200
LOAD 135 OHM
3 TX SPURIOUS 450KHz dB 30 36 - LOAD 135 OHM
4 DATA RX SENSITIVITY 450KHz dBV - -42 -36
ON HOOK
5 RX INPUT IMPEADANCE OFF
HOOK 450KHz Ω
ΩΩ
Ω400 600 800
13

3. Hardware block diagram
See attached paper.
4. Main component (semi conductor)
NAME TYPE MAKER FUNCTION PACKAGE
CPU UPD78078 NEC 8bit One-Chip CPU(4.5MHz)
FOR MAIN CONTROL
ROM 60KB RAM 2KB
TIMER 16bit x1 8bit x4
WDT,CLOCK,BUZZER
SIO x3 CSIO I2BUS ASYNC
A/D 8bit x8 D/A 8bit x2
PIO 88ports
SUB X’TAL FOR CLOCK/BACKUP MODE
100pin QFP
CPU UPD78082 NEC 8bit One-Chip CPU (3.58MHz)
FOR CALLER-ID CONTROL 44pin QFP
IC TEA1110AT PHILIPS SPEECH N/W IC 14pin SOP
IC MC33219 MOTOROLA SPEAKER PHONE IC
With RX SPEAKER VOLUME CONTROL 24pin SOP
IC NJM386 JRC AUDIO POWER AMP(300mW) IC
FOR SPEAKER 8pin DIP
IC KA8602 SAMSUNG AUDIO AMP IC FOR RECEIVER 8pin SOP
IC KS58015 SAMSUNG PB GENERATOR IC 14pin SOP
IC KA8507 SAMSUNG EXPANDER/COMPANDER IC
FOR INTERCOM 20pin SOP
IC CMX602
CML CALLER-ID FSK DECORDER 1200bps FSK DECORDING
CAS TONE DETECT
(IT-M804 ONLY)
16pin SOP
IC 24LC64 MICRO
CHIP 64k bit EEPROM FOR SYSTEM DATA CALL-ID DATA
SPEED-DIAL PHONE DIRECTORY DATA
(IT-M804 ONLY)
8pin SOP
IC 24LC08 MICRO
CHIP 8k bit EEPROM FOR SYSTEM DATA SPEED-DIAL
PHONE DIRECTORY DATA
(IT-M704 ONLY)
8pin SOP
IC 20WZ5U SHARP REGULATER(ADJUSTABLE TYPE:6V) 4pin SOP
IC KS0068 SAMSUNG LCD CONTROLLER
60 SEGMENT x 16 COMMON 100pin QFP
IC CMX673 CML STUTTER & BUSY TONE DETECTOR 8pin SOP
14

5. Board structure
Organization of boards.
NAME FUNCTION SIZE Material Soldering
MAIN Except KEY/LED
LCD 198 x 167 Both side Silver-through Paper phenol board Reflow /Dip
KEY KEY/LED 115 x 115 One side paper phenol
board Hand Soldering
LCD LCD
Speed Dial Key
JOG DIAL
IT-M804:
144.4 x 119.6
IT-M704:
112.6 x 109.7
Both side Silver-through
Paper phenol board Soldering side: Reflow Part side: Hand Soldering
15

6. Explanation of the Circuit
6 -1 MAIN CPU
CPU μPD78076is used for main control of this equipment.
Specifications
1FREQUEN
CY 4.5MHz
2MEMORY ROM 60KBytes
RAM 2Kbytes
16bit TIMER x 1CH BELL OUTPUT3TIMER 8bit TIMER x 4CH INTERCOM CARRIER
DATA CARRIER
TIMER INTERRUPT
4SIO CSIO x 3CH EEPROM I/F
SUB CPU I/F
5PIO 80 PORTS SEE PORT MAP
A/D CONVERTER
x 8CH IN USE VOLTAGE DETECT
BUZZER OUTPUT KEY TOUCH TONE
SUB CLOCK X'TAL 32.768KHz FOR CLOCK BACK UP
BACK UP 9V BATTERY(006P)
6MISC
EXTERNAL MEMORY 64k bit EEPROM 24LC64(IT-M804)
8K bit EEPROM 24LC08B(IT-M704)
Outline of CPU peripheral circuit
16

CPU PORT MAP
A) MAIN CPU PORT MAP ASSIGNMENT
NO PIN NAME I/O NAME OF SIGNAL ACTIVE FUNCTION
1 P120/RTP0 I HEAD SET DETECT L L: HEAD SET H: NO HEADSET
2 P121/RTP1 O HEAD /HAND SET CONT H L: HAND SET H: HEAD SET
3 P122/RTP2 O H/S TONE CNT H H:H/S TONE OUT
4 P123/RTP3 I RX CARRIER DETECT H H:RX CARRIER DETECT
5 P124/RTP4 O LCD_D4 LCD CTL&DRV I/F:D4
6 P125/RTP5 O LCD_D5 LCD CTL&DRV I/F:D5
7 P126/RTP6 O LCD_D6 LCD CTL&DRV I/F:D6
8 P127/RTP7 O LCD_D7 LCD CTL&DRV I/F:D7
9 IC VSS VSS
10 X2 4.5MHZ MAIN CLOCK (4.5MHZ)
11 X1 4.5MHZ MAIN CLOCK (4.5MHZ) INPUT
12 VDD 5V（＋） VDD (+5V)
13 XT2 32.768KHZ SUB CLOCK(32.768KHZ)
14 XT1/P07 32.768KHZ INPUT SUB CLOCK(32.768KHZ)
15 RESET I RESET L RESET
16 P00/INTP0/T100 I RX DATA 780 BPS CTL 16 TELL RX DATA
17 P00/INTP1/T101 I POWER DOWN L DETECTION OF AC POWER CUT OFF
18 P02/INTP2 I BUSY TONE DET H DETECTION OF BUSY TONE /
STUTTER TONE
19 P03/INTP3 O CID BUSY CNT CONTROL CID BUSY
20 P04/INTP4 O LCD_RS LCD CTL&DRV I/F:RS
21 P05/INTP5 O LCD_RW LCD CTL&DRV I/F:RW
22 P06/INTP6 O LCD_ENABLE LCD CTL&DRV I/F:E
23 AVDD
24 AVREF0 CONNECT WITH VDD
25 P10/ANI0 I L1 INUSE DETECT A/D DETECTION OF LINE1 INUSE
：UNDER 33 VOLT
26 P11/ANI1 I L2 INUSE DETECT A/D DETECTION OF LINE2 INUSE
：UNDER 33 VOLT
27 P12/ANI2 I L3 INUSE DETECT A/D DETECTION OF LINE3 INUSE
：UNDER 33 VOLT
28 P13/ANI3 I L4 INUSE DETECT A/D DETECTION OF LINE4 INUSE
：UNDER 33 VOLT
29 P14/ANI4 I L1 RINGER DETECT S/W(L) DETECTION OF L1 RINGER
USUALLY :H
30 P15/ANI5 I L2 RINGER DETECT S/W(L) DETECTION OF L2 RINGER
USUALLY :H
31 P16/ANI6 I L3 RINGER DETECT S/W(L) DETECTION OF L3 RINGER
USUALLY :H
32 P17/ANI7 I L4 RINGER DETECT S/W(L) DETECTION OF L4 RINGER
USUALLY :H
33 AVSS
34 P130/AN00 O SPKER VOLUME CONT SPEAKER PHONE VOLUME
CONTROL (ANALOGUE OUTPUT)
35 P131/AN01 O N.C
36 AVREF1 I SPKER VOL VB DET DETECTION OF SPEAKER PHONE
VOLUME VB
S/W: Square Wave
17

ASSIGNMENT
NO PIN NAME I/O NAME OF SIGNAL ACTIVE FUNCTION
37 P70/SI2/RxD I RX DATA INPUT RX DATA INPUT
38 P71/SO2/ＴxD O TX DATA OUTPUT TX DATA OUTPUT (780bps)
39 P71SCK2/ACK O SUB CPU RESET L SUB CPU RESET SIGNAL
40 VSS VSS
41 P20/SI1 I CID DO FRMSUB CPU SUB CPU DO SIGNAL
42 P21/SO1 O CID DITOSUB CPU SUB CPU DI SIGNAL
43 P22/SCK1 O CID CLK CONNECTION WITH SUB CPU CLK
44 P23/STB O CID ANS H CONNECTION WITH SUB CPU ANS
45 P24/BUSY I CID REQ L CONNECTION WITH SUB CPU REQ
46 P25/SI0/SDA0 O EEPROM WP L EEPROM WP
47 P26/SO0/SDO0 I/O EEPROM SDA EEPROM SDA
48 P27/SCK0/SCL O EEPROM SCLK EEPROM SCL(64KBITS)
49 P80/A0 O LINE1LOOP H COMMUNICATION ON LINE1
50 P81/A1 O LINE2LOOP H COMMUNICATION ON LINE2
51 P82/A2 O LINE3LOOP H COMMUNICATION ON LINE3
52 P83/A3 O LINE4LOOP H COMMUNICATION ON LINE4
53 P84/A4 O LINE1HOLD L LINE1 HOLD
54 P85/A5 O LINE2HOLD L LINE2 HOLD
55 P86/A6 O LINE3HOLD L LINE3 HOLD
56 P87/A7 O LINE4HOLD L LINE4 HOLD
57 P40/AD0 I KEY IN 0 L KEY MATRIX IN 0
58 P41/AD1 I KEY IN 1 L KEY MATRIX IN 1
59 P42/AD2 I KEY IN 2 L KEY MATRIX IN 2
60 P43/AD3 I KEY IN 3 L KEY MATRIX IN 3
61 P44/AD4 I KEY IN 4 L KEY MATRIX IN 4
62 P45/AD5 I KEY IN 5 L KEY MATRIX IN 5
63 P46/AD6 I KEY IN 6 L KEY MATRIX IN 6
64 P47/AD7 I HOOK S/W L HOOK S/W OFF HK : L ON HK : H
65 P50/A8 O KEY SCAN 0 L KEY SCAN OUT 0/LED D1
66 P51/A9 O KEY SCAN 1 L KEY SCAN OUT 1/LED D2
67 P52/A10 O KEY SCAN 2 L KEY SCAN OUT 2/LED D3
68 P53/A11 O KEY SCAN 3 L KEY SCAN OUT 3/LED D4
69 P54/A12 O KEY SCAN 4 L KEY SCAN OUT 4/LED D5
70 P55/A13 O KEY SCAN 5 L KEY SCAN OUT 5/LED D6
71 VSS VSS
72 P56/A14 O KEY SCAN 6 L KEY SCAN OUT 6/LED D7
73 P57/A15 O KEY SCAN 7 L KEY SCAN OUT 7/LED D8
74 P60 O LED LATCH 0 H LED EXPANDER 1 LATCH 1 STROBE
75 P61 O LED LATCH 1 H LED EXPANDER 2 LATCH 2 STROBE
76 P62 O HAND SET TX CONT H HAND SET TX CONTROL
77 P63 O HAND SET RX CONT H HAND SET RX CONTROL
78 P64/RD O INTERCOM CNT H INTERCOM CNTROL
79 P65/WR O INT HANDSET CNT H INTERCOM HANDSET CNTROL
80 P66/WAIT I CPX956/957 SEL L/H MODEL SELECTION L: IT-M804
H : IT-M704
81 P67/ASTB O POWER SAVE H POWER OFF: H POWER ON: L
82 P100/TI5/TO5 O 450KHZ DATA CARRIER CONTROL DATA CARRIER(450KHZ)
83 P101/TI6/TO6 O 321/281KHZ CARRIER INTERCOM CARRIER ORG :321KHZ
ANS :281KHZ
84 P102 O R/H VOL1 ON HOOK :RINGER VOLUME
OFF HOOK : HAND SET VOLUME
18

APPORTIONMENT
NO PIN NAME I/O NAME OF SIGNAL ACTIVE FUNCTION
ON HOOK : RINGER VOLUME
OFF HOOK : HAND SET VOLUME
VOLUME R/H VOL 1 R/H VOL 2
HI H L
MID L H
LOW H H
85 P103 O R/H VOL2
STD BY/OFF L L
86 P30/TO0 O PULSE DIAL H PULSE BREAK : H
MAKE/ON CALL : L
87 P31/TO1 O BEEP OUT BEEP/RINGBACK TONE OUTPUT
88 P32/TO2 O DTMF D0 H TONE GEGERATOR D0
89 P33/TI1 O DTMF D1 H TONE GEGERATOR D1
90 P34/TI2 O DTMF D2 H TONE GEGERATOR D2
91 P35/PCL O DTMF D3 H TONE GEGERATOR D3
92 P36/BUZ O KEY TONE KEY TOUCH TONE
93 P37 O DTMF CE H TONE GEGERATOR ENABLE
94 P90 O SPK AMP ON L SPEAKER AMP ON
95 P91 O SPK RX CNT H SPEAKER PHONE RX CONTROL
96 P92 O SPK TX CNT H SPEAKER PHONE TX CONTROL
97 P93 O SPK MIC MUTE H SPEAKER PHONE MIC MUTE
98 P94 O SPK IC CD H SPEAKER IC CHIP DISABLE : H
ICACTIVE:L
99 P95 I JOG DIAL + JOG DIAL +
100 P96 I JOG DIAL - JOG DIAL -
B)SUB CPU PORT MAP APPORTIONMENT
PIN PIN-NAME IO IO NAME OF SIGNAL ACTIV
E FUNCTION
1 P12/AN12 I/O NC
2 P13/AN13 I/O I CALL ID RX DATA_IN LINE 1 FROM FSK RECEIVER IC50
3 P14/AN14 I/O O CALL ID DATA CLOCK LINE 1 TO FSK RECEIVER IC501
4 P15/AN15 I/O I CALL ID DATA DETECT LINE 1 L FROM FSK RECEIVER IC501
5 P16/AN16 I/O I CALL ID DATA REQUEST LINE 1 L FROM FSK RECEIVER IC501
6 P17/AN17 I/O O CALL ID MODE SET LINE 1 L/H TOFSK RECEIVER IC501
L: DETECTION OF DUAL
TONE ALARMSIGNAL
H: FSK SIGNAL RECEPTION
7 P72/ASCK/SCK2 I/O I CALL ID CLOCK FROM MAIN CPU CLOCK OUT
8 P71/TXD/SO2 I/O O CALL ID DATA OUT TO MAIN CPU DATA IN
9 P70/RXD/SI2 I/O I CALL ID DATA IN FROM MAIN CPU DATA OUT
10 P101/T16/TO6 I/O I CALL ID BUSY IN L FROM MAIN CPU BUSY OUT
11 P100/TI5/TO5 I/O O FSK/CAS SEL CONT H/L H:FSK L:CAS
12 P50 I/O I CALL ID RX DATA LINE 2 FROM FSK RECEIVER IC502
13 P51 I/O O CALL ID DATA CLOCK LINE 2 TO FSK RECEIVER IC502
14 P52 I/O I CALL ID DATA DETECT LINE 2 L FROM FSK RECEIVER IC502
15 P53 I/O I CALL ID DATA REQUEST LINE 2 L FROM FSK RECEIVER IC502
19

APPORTIONMENT
PIN PIN-NAME IO IO NAME OF SIGNAL ACTIV
E FUNCTION
16 P54 I/O O CALL ID MODE SET LINE 2 L/H TOFSK RECEIVER IC502
L: DETECTION OF DUAL
TONE ALARMSIGNAL
H: FSK SIGNAL RECEPTION
17 VSS - VSS
18 P55 I/O I CALL ID RX DATA LINE 3 FROM FSK RECEIVER IC503
19 P56 I/O O CALL ID DATA CLOCK LINE 3 TO FSK RECEIVER IC503
20 P57 I/O I CALL ID DATA DETECT LINE 3 L FROM FSK RECEIVER IC503
21 P30 I/O I CALL ID DATA REQUEST LINE 3 L FROM FSK RECEIVER IC503
22 P31 I/O O CALL ID MODE SET LINE 3 L/H TO FSK RECEIVER IC503
L: DETECTION OF DUAL
TONE ALARMSIGNAL
H: FSK SIGNAL RECEPTION
23 NC NC VSS
24 P32 I/O I CALL ID RX DATA LINE 4 FROM FSK RECEIVER IC504
25 P33 I/O O CALL ID DATA CLOCK LINE 4 TO FSK RECEIVER IC504
26 P34 I/O I CALL ID DATA DETECT LINE 4 L FROM FSK RECEIVER IC504
27 P35/PCL I/O I CALL ID DATA REQUEST LINE 4 L FROM FSK RECEIVER IC504
28 P36/BUZ I/O O CALL ID MODE SET LINE 4 L/H TO FSK RECEIVER IC504
L: DETECTION OF DUAL
TONE ALARMSIGNAL
H: FSK SIGNAL RECEPTION
29 P37 I/O NC NC
30 P00 I/O I LI LOOP DETECT H FROM MAIN CPU " L1LP"
31 P01/INTP1 I/O O CALL ID DATA REQUEST L MAIN CPU DATA REQUEST
32 P02/INTP2 I/O I CALL ID DATA ANS L MAIN CPU DATA ACK
33 P03/INTP3 I/O I L2 LOOP DETECT H FROM MAIN CPU " L2LP"
34 NC - NC GND
35 RESET I I L CPU RESET FROM MAIN CPU
36 VPP - GND
37 X2 - CPU CLOCK
38 X1 - CPU CLOCK INPUT
39 VDD - 5V
40 AVDD - 5V
41 AVREF - 5V
42 AVSS - GND
43 P10/AN10 I/O I L3 LOOP DETECT H FROM MAIN CPU " L3LP"
44 P11/AN11 I/O I L4 LOOP DETECT H FROM MAIN CPU " L4LP"
FSK:FrequencyShiftKeying
20