After Sales
Technical Documentation
RAE/RAK–1N
Baseband
Page 2–15
Original, 08/96
Table 15. PDA board to board connector (B2B) (continued)
NotesPin(s)Signal Name
RDA 34 DBUS received data from the accessories
TDA 35 Transmitted DBUS–data to the accessories
M2BUS 36 Serial bidirectional data and control between
the CMT and accessories.
LID 38 Cover switch state from PDA to CMT
EXTMIC 41 External audio input from accessories or
handsfree microphone. Multiplexed with junc-
tion box connection indication. 16.8k pull down
in CMT
EXTEAR 42 External audio output to accessories or hands-
free speaker. 100k pull–down in CMT to turn
on the junction box.
AGND 43 Analog ground for accessories.
Connected directly to digital ground on the
PCB.
Table 16. PHF speaker connector
Signal Name Pin(s) Notes
PHFEARN 1 PHF speaker, negative node
PHFEARP 2 PHF speaker, positive node
Table 17. SIMFLEX Connector
Signal Name Pin Notes
VBATT 1 Battery voltage for buzzer
BUZZER 2 Excitation for buzzer (pull–down)
EARN 3
Differential audio for the earpiece
EARP 4
GND 5,10 Ground
SIMCLK 6 Clock for SIM data
SIMRESET 7 Reset for SIM
VSIM 8 SIM voltage supply
SIMDATA 9 Serial data for SIM
MICN 11
Differential audio from the microphone
MICP 12
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