User Guide

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