Sony SPP-S2720, Руководство по обслуживанию

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37
SPP-S2720
6-12. IC PIN FUNCTION DESCRIPTION
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BASE MAIN BOARD IC301 SB875064W-5W61 (SYSTEM CONTROLLER)
Pin No. Pin Name I/O
Description
1 SS SPI CLK O Serial data transfer clock signal output to the RF unit (RF271)
2 SO1 O Two-way data bus with the liquid crystal display module Not used (open)
3 SI1 O Chip select signal output to the liquid crystal display module “L” active Not used (open)
4 SCK1 O Serial data transfer clock signal output to the liquid crystal display module Not used (open)
5 P16 I Hook on/off detection signal input “H”: hook on, “L”: hook off Not used (fixed at “H”)
6
OFF HOOK CONT
O Hook on/off control signal output “L”: hook off, “H”: hook on
7 PWM1 O Not used (open)
8 PWMO O Not used (open)
9 VDD2 — Power supply terminal (+5V)
10 VSS2 — Ground terminal
11
FLASH WRITE
SELECT
I Not used (open)
12 P01 I Not used (fixed at “H”)
13 , 14 ROW1 , ROW2 I Key data input to the key matrix “L” input when key pressing Not used (open)
15 ROW3 I HANDSET LOCATOR switch (S751) input terminal “L” input when key pressing
16 to 18 ROW4 to ROW6 I Key data input to the key matrix “L” input when key pressing Not used (open)
19 P20 O Reset signal output to the liquid crystal display module Not used (open)
20, 21 COL1, COL2 O Key scan output to the key matrix “L” output when key waiting Not used (open)
22, 23 P23, P24 I Not used (fixed at “L”)
24 COL3 O Key scan output to the key matrix “L” output when key waiting Not used (open)
25 COL4 O HANDSET LOCATOR switch (S751) output terminal “L” output when key waiting
26 COL5 O Key scan output to the key matrix “L” output when key waiting Not used (open)
27 DSP SC O Serial data transfer clock signal output to the DSP (IC402)
28 DSP HRNW O Data read/write selection signal output to the DSP (IC402) “L”: data write, “H”: data read
29 DSP CSN O Chip select signal output to the DSP (IC402) “L” active
30 DSP ACKN I Acknowledge signal input from the DSP (IC402) “L” active
31 DSP SDO O Serial data output to the DSP (IC402)
32 DSP SDI I Serial data input from the DSP (IC402)
33 DSP PWR DOWN O Power down control signal output to the DSP (IC402) “L”: power down
34 DSP RESET O Reset signal output to the DSP (IC402) “L”: reset
35 VSS3 — Ground terminal
36 VDD3 — Power supply terminal (+5V)
37 E2PROM SCL O Serial data transfer clock signal output to the EEPROM (IC303)
38 E2PROM SDA I/O Two-way data bus with the EEPROM (IC303)
39 PC5 I
Not used (open)
40 LED (IN-USE) O LED drive signal output of the IN USE indicator (D752) “L”: LED on
41
LED (NEW CALL)
O LED drive signal output of the NEW CALL indicator (D735) “L”: LED on
42
ANTENNA
SELECT B
O Main antenna on/off control signal output “L”: antenna on
43
ANTENNA
SELECT A
O Sub antenna on/off control signal output “L”: antenna on
44 LED (VMWI) O LED drive signal output of the VOICE MAIL indicator (D754) “L”: LED on
45
SS PWR DOWN
CONT
O Power down control signal output to the RF unit (RF271) “H”: power down
46 SS RESET O Reset signal output to the RF unit (RF271) “L”: reset
47 SS SPI EN O Enable signal output to the RF unit (RF271) “L” active