Sony SPP-M937 Service Manual page 27

BASE MAIN BOARD U2 TMP87PM53F-M937
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Pin No. Pin name
1 VSS
2 XOUT
3 XIN
4 RESET
5 MIC MUTE
6 SPK MUTE
7
–——––––––––––––––––
8 SPP MUTE
9 RNG LEVEL1 L
10 RNG LEVEL 1 OFF
11 RNG LEVEL2 L
12 RNG LEVEL 2 OFF
13 VOL 0
14 VOL 1
15 VOL 2
––––––––––––––––––––––––––
16 TX ENABLE
17
–——––––––––––––––––
18
–——––––––––––––––––
19 RX DATA
20 HS BEEP
––––––––––––––––––––
21 CAR DET
22
–——––––––––––––––––
23
–——––––––––––––––––
24 TONE/PULSE
–––––––––––––––––––––
25 RX MUTE
–––––––––––––––––––––
26 TX MUTE
27 BS BEEP
28 ATTN DATA
29 TX DATA
30 RING 1DET
31 RING 2DET
32 EXT DET 1
33 EXT DET 2
34 LIN 1 DROP
35 LIN 2 DROP
36 HOOK 1
37 HOOK 2
38
–——––––––––––––––––
39
–——––––––––––––––––
40 VDD
41 ATE DATA
42 ATE EN
43 PLL EN
44 PLL CLK
45 EEP D0
(SYSTEM CONTROL)
I/O
— Ground terminal.
O Main system clock outut (4MHz).
I Main system clock input (4MHz).
I System reset input.
O Mic mute output.
O Speaker mute output.
— Not used (OPEN).
O Microphone mute signal output.
I Line 1 ringer level switch input.
I Line 1 ringer level switch input.
I Line 2 ringer level switch input.
I Line 2 ringer level switch input.
I VOL switch input.
I VOL switch input.
I VOL switch input.
O TX system power control signal output.
— Not used (OPEN).
— Not used (OPEN).
I Receiving data input.
O Beep sound driver signal output.
I Carrier detect signal input.
— Not used (OPEN).
— Not used (OPEN).
I TONE/PULSE switch input.
O RX muting signal output.
O TX muting signal output.
O Base set Beep signal output.
O Audio attenuate control signal output.
O Transmit data output.
I Detect signal input of the ringer coming (LINE 1).
I Detect signal input of the ringer coming (LINE 2).
I Detect signal input of the telephone line 1 extended status.
I Detect signal input of the telephone line 2 extended status.
I Detect signal input of the telephone line 1 parallel phone pick-up.
I Detect signal input of the telephone line 2 parallel phone pick-up.
O Hook on/off control signal output for line 1.
O Hook on/off control signal output for line 2.
— Not used (OPEN).
— Not used (OPEN).
— Power supply terminal (+5V).
I/O Communication in/out terminal with ATE program.
O Chip enable output for the ATE mode.
O Chip enable output for PLL IC.
O Serial data transfer clock signal output to PLL and EEPROM.
I Serial data input from EEPROM.
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Description