41
SPP-S2720
•
HAND MAIN BOARD IC121 SH875048W-5W62 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
SS SPI CLK
O
Serial data transfer clock signal output to the RF unit (RF61)
2
LCD SDA
O
Two-way data bus with the liquid crystal display module (LCD201)
3
LCD CS
O
Chip select signal output to the liquid crystal display module (LCD201) “L” active
4
LCD SCL
O
Serial data transfer clock signal output to the liquid crystal display module (LCD201)
5
CHARGE CONT
O
Charge control signal output
6
RING OUTPUT
O
Buzzer sound drive signal output
7
LED CONT (KEY)
O
LED drive signal output of the key back light (D125 to D128) “L”: LED on
8
LED CONT (LCD)
O
LED drive signal output of the liquid crystal display module back light (D122 to D124)
“L”: LED on
9
VDD2
—
Power supply terminal (+3.3V)
10
VSS2
—
Ground terminal
11
FLASH WRITE
SELECT
I
Not used (fixed at “H”)
12
JOG PUSH
I
PUSH ENTER switch (S2) input terminal “L” input when key pressing
13
ROW1
I
Key data input terminal “L” input when key pressing Not used (fixed at “H”)
14 to 18 ROW2 to ROW6
I
Key data input from the key matrix “L” input when key pressing
19
LCD RS
O
Reset signal output to the liquid crystal display module (LCD201)
20, 21
COL1, COL2
O
Key scan output to the key matrix “L” output when key waiting
22
JOG A
I
Jog dial pulse input of the rotary encoder (JOG1) (A phase input)
23
JOG B
I
Jog dial pulse input of the rotary encoder (JOG1) (B phase input)
24 to 26
COL3 to COL5
O
Key scan output to the key matrix “L” output when key waiting
27
SP AMP
POWER CONT
O
Power on/off control signal output for speaker amplifier “L”: power on
28
SS POWER CONT
(STB)
O
Power on/off control signal output for RF unit (RF61) at the stand-by “L”: half power on
29
SS POWER CONT
(TALK)
O
Power on/off control signal output for RF unit (RF61) at the talk “L”: full power on
30
BUZZER VOL
O
Buzzer sound level control signal output “L”: low level
31
LOW BATT
DET
I
Battery level detection signal input from the S-80830 (IC102) “L”: battery low level
32
PB2
O
Not used (open)
33
PB1
I
Not used (open)
34
INTERCOM
CONT
O
Intercom control signal output
35
VSS3
—
Ground terminal
36
VDD3
—
Power supply terminal (+3.3V)
37
E2PROM SCL
O
Serial data transfer clock signal output to the EEPROM (IC122)
38
E2PROM SDA
I/O
Two-way data bus with the EEPROM (IC122)
39
PC5
I/O
Not used (open)
40, 41
PC2, PC1
O
Not used (open)
42
RX MUTE
O
Muting control signal output “H”: muting on
43
TX MUTE
O
Muting control signal output “H”: muting on
44
CODEC RESET
O
Reset signal output to the CODEC (IC1) “L”: reset
45
SS PWR DOWN
CONT
O
Power down control signal output to the RF unit (RF61) “H”: power down
46
SS RESET
O
Reset signal output to the RF unit (RF61) “L”: reset
47
SS SPI EN
O
Enable signal output to the RF unit (RF61) “L” active
Summary of Contents for SPP-S2720
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