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5-12. IC PIN FUNCTION DESCRIPTION
• BASE MAIN BOARD IC5 MB89173PF-G-256-BND (SYSTEM CONTROLLER)
Pin No.
Pin Name
1
DTMF
2
RESET
3, 4
MOD0, MOD1
5
X0
6
X1
7
VCC
8
X0A
9
X1A
10 to 12
NC
13
TALK
14 to 17
NC
18
BATT OFF
19
GND
20
PAGE
21
BELL IN
22
TONE/PULSE
23
FLASH 270
24
FLASH 100
25
CHG OUT
26 to 28
NC
LED INUSE2,
29, 30
LED INUSE1
LED CHG2,
31, 32
LED CHG1
33
NC
34
DTMF
35
CHG IN
36
RX MUTE
37
TX MUTE
38
DATA IN
39
SQ IN
40
PLL CLK
41
PLL DATA
42
PLL EN
43
GND
44, 45
NC
46
TX B
47
DATA OUT
48
DATA EN
I/O
O
DTMF tone signal output terminal
System reset signal input from the reset signal generator (Q9) "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
I
Setting terminal for the CPU operational mode Fixed at "L" in this set
I
Main system clock input terminal (3.579545 MHz)
O
Main system clock output terminal (3.579545 MHz)
—
Power supply terminal (+3V)
I
Sub system clock input terminal (32.768 kHz) Not used (fixed at "L")
O
Sub system clock output terminal (32.768 kHz) Not used (open)
O
Not used (open)
O
Hook on/off control signal output terminal "H": hook on
O
Not used (open)
I
Battery level detect signal input from the RH5VL28CA (IC6) "L": battery off
—
Ground terminal
I
HANDSET LOCATOR switch (S1) input terminal
I
Detect signal input of the ringer coming "L": ringer coming
I
DIAL MODE switch (S2) input terminal
FLASH speed switch (S3) input terminal
I
"L": speed 270 (switch position is 2), "H": speed 100 or speed 650 (switch position is 1 or 3)
FLASH speed switch (S3) input terminal
I
"L": speed 100 (switch position is 1), "H": speed 270 or speed 650 (switch position is 2 or 3)
O
Charge on/off control signal output terminal "H": charge on
O
Not used (open)
O
LED drive signal output of the LINE indicator (D7) "L": LED on
O
LED drive signal output of the CHARGE indicator (D6) "L": LED on
O
Not used (open)
O
DTMF tone signal output terminal
I
Charge detection signal input terminal "L": charge on
Muting control signal output to the LA8633VU (IC1) "L": muting on
O
At RX mode: After receiving premble bits from handset muting it until data sent finished
Muting control signal output to the LA8633VU (IC1) "L": muting on
O
At TX mode: During sending data to handset, muting it
I
Receive data input from the LA8633VU (IC1)
Squelch signal (carrier detection signal) input from the MC3361CDR2 (IC3)
I
"L": carrier present, "H": no carrier
O
PLL serial data transfer clock signal output to the M64884FP (IC302)
O
PLL serial data output to the M64884FP (IC302)
Chip enable signal output to the M64884FP (IC302)
O
When PLL EN goes from "L" to "H", it load data from PLL DATA
—
Ground terminal
O
Not used (open)
O
TX system power supply on/off control signal output "L": TX system power on
O
Transmit data output terminal
O
Transmit data enable signal output terminal
Description
"L" is input when key pressing
"L": tone mode, "H": pulse mode
29
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