Nokia 232, 239 服务手册
After Sales
Technical Documentation
Handsfree Desktop Charger CHH–7
Original, 11/94
Page 19
Table 24. Port B Signals of the Processor: (continued)
PORT B
NOTES
PB0: SERVICE J301
(output)
See next table
PB1: SERVICE J302
(output)
See next table
PB2: SERVICE J303
(output)
See next table
PB3: SERVICE J304
(output)
See next table
PB4: SERVICE J305
(output)
Not Used
PB5: LAST NUMBER REDIAL (input)
Last Number Redial button, ”0”: activation
PB6: HFMIC MUTE
(input)
HF Microphone Muting, ”0”: activation
PB7: PHONE IDENTIFICATION (input)
pulled up +5V (= state ”1”)
Table 25. Service Test Pins of Port B:
J304
J303
J302
J301
NOTES
0
0
0
1
Battery voltage hi limit reached
0
0
1
0
Maximum charge time
0
0
1
1
Voltage drop (delta V)
0
1
0
0
Battery temperature high
0
1
0
1
Constant voltage
Table 26. Port C Signals of the Processor:
PORT C
NOTES
PC0: TXD
(output)
M2BUS Transmit
PC1: RXD
(input)
M2BUS Receive
PC2: Unused
(input)
Not Used
PC3: TRXDINT
(input)
M2BUS Interrupt
PC4: DVCE0
(input)
Device Type ”1”
⇒
”CHH 7”
PC5: DVCE1
(input)
⇒
CHH–7
Device Type ”0”
PC6: SPARE CHARGE
(output)
Spare Battery Charging, ”1”: Charging on
PC7: WATCHDOG
(output)
Watchdog Reset, ”01010...”: Watchdog reset on