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• HAND MAIN BOARD IC603 MB89174LPF-G-289-BND (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Description
1 NC O Not used (open)
2 RESET I
System reset signal input from the reset signal generator (Q615) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
3, 4 MOD0, MOD1 I Setting terminal for the CPU operational mode Fixed at “L” in this set
5 X0 I Main system clock input terminal (3.579545 MHz)
6 X1 O Main system clock output terminal (3.579545 MHz)
7VCC— Power supply terminal (+3V)
8 X0A I Sub system clock input terminal Not used (fixed at “L”)
9 X1A O Sub system clock output terminal Not used (open)
10 NC O Not used (open)
11 TX MUTE O
Muting control signal output to the IR3N74AN (IC602) “L”: muting on
At TX mode: During sending data to base unit, muting it
12 RX MUTE O
Muting control signal output to the IR3N74AN (IC602) “L”: muting on
At RX mode: After receiving premble bits from base unit muting it until data sent finished
13 SC O Main system power supply (+3V) on/off control signal output “H”: main system power on
14 NC O Not used (open)
15, 16 TALK LED O LED drive signal output of the TALK/BATT LOW indicator (D607) “L”: LED on
17 KEY LED O LED drive signal output of the key back light (D609 to D612) “L”: LED on
18 NC O Not used (open)
19 GND — Ground terminal
20 NC O Not used (open)
21 to 25 ROW5 to ROW1 I Key scan signal input from the key matrix
26 STPCNT O Wakeup control signal output terminal
27 WAKEUP I Wakeup input terminal
28 NC O Not used (open)
29 BATT OFF I Battery level detect signal input from the XC612N3328MR (IC605) “L”: battery off
30 to 34 COL5 to COL1 O Key scan signal output to the key matrix
35 BATT LOW I Battery level detect signal input from the XC612N3328MR (IC605) “L”: battery low level
36 CHG IN I Charge detection signal input terminal “H”: charge on
37 CONV O
Speaker output circuit power supply on/off control signal output
“L”: speaker output circuit power on
38 RING OUT O Buzzer sound drive signal output terminal
39 RING VOL O Buzzer sound level control signal output terminal “L”: low level, “H”: high level
40 DATA IN I Receive data input terminal
41 SQ IN I
Squelch signal (carrier detection signal) input from the MC3361CDR2 (IC601)
“L”: carrier present, “H”: no carrier
42 TX B O TX system power supply on/off control signal output “L”: TX system power on
43 GND — Ground terminal
44 DATA OUT O Transmit data output terminal
45 DATA EN O Transmit data enable signal output terminal
46 PLL CLK O PLL serial data transfer clock signal output to the M64884FP (IC502)
47 PLL DATA O PLL serial data output to the M64884FP (IC502)
48 PLL EN O
Chip enable signal output to the M64884FP (IC502)
When PLL EN goes from “L” to “H”, it load data from PLL DATA
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