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• HAND MAIN BOARD IC404 MB89174PF-G-257-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
NC
11
TX MUTE
12
RX MUTE
13
SC
14
NC
15, 16
TALK LED
17
KEY LED
18
NC
19
GND
20, 21
NC
22 to 25 ROW4 to ROW1
26
STPCNT
27
WAKEUP
28
NC
29
BATT OFF
30 to 34
COL5 to COL1
35
BATT LOW
36
CHG IN
37
CONV
38
RING OUT
39
RING VOL
40
DATA IN
41
SQ IN
42
TX B
43
GND
44
DATA OUT
45
DATA EN
46
PLL CLK
47
PLL DATA
48
PLL EN
30
I/O
O
DTMF tone signal output terminal Not used (open)
System reset signal input from the reset signal generator (Q411) "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)
Muting control signal output to the LA8633VU (IC403) "L": muting on
O
At TX mode: During sending data to base unit, muting it
Muting control signal output to the LA8633VU (IC403) "L": muting on
O
At RX mode: After receiving premble bits from base unit muting it until data sent finished
O
Main system power supply (+3V) on/off control signal output "H": main system power on
O
Not used (open)
O
LED drive signal output of the TALK/BATT LOW indicator (D408) "L": LED on
O
LED drive signal output of the key back light (D421 to D424) "L": LED on
O
Not used (open)
—
Ground terminal
O
Not used (open)
I
Key scan signal input from the key matrix
O
Wakeup control signal output terminal
I
Wakeup input terminal
O
Not used (open)
I
Battery level detect signal input from the XC612N3328MR (IC406) "L": battery off
O
Key scan signal output to the key matrix
I
Battery level detect signal input from the XC612N3328MR (IC406) "L": battery low level
I
Charge detection signal input terminal "L": charge on
O
Standby control signal output to the LA8633VU (IC403) "L": standby mode
O
Buzzer sound drive signal output terminal
O
Buzzer sound level control signal output terminal
I
Receive data input from the LA8633VU (IC403)
Squelch signal (carrier detection signal) input from the MC3361CDR2 (IC401)
I
"L": carrier present, "H": no carrier
O
TX system power supply on/off control signal output "L": TX system power on
—
Ground terminal
O
Transmit data output terminal
O
Transmit data enable signal output terminal
O
PLL serial data transfer clock signal output to the M64884FP (IC502)
O
PLL serial data output to the M64884FP (IC502)
Chip enable signal output to the M64884FP (IC502)
O
When PLL EN goes from "L" to "H", it load data from PLL DATA
Description
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