After Sales
Technical Documentation
RAE/RAK–1N
PDA Hardware
Page 6 – 15
Original, 08/96
Table 8. PDA board to board connector (continued)
NotesPinSignal Name
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 junc-
tion box.
AGND 43 Analog ground for accessories.
Connected directly to digital ground on the
PCB.
Table 9. HFMIC Connector
Signal Name Pin Notes
PHFMICN 1 Negative MIC input
PHFMICP 2 Positive MIC input
Table 10. LCDM module flex connector on PROCU
Signal Name Pin Notes
GND 10, 17, 24 Ground or VB (flex material dependent)
VB 1 Power lines for backlight LEDs
VL1 2 Phone LCD power
LCMUIF(3:0) 6, 5, 4, 3 Lines for keypad read and LCD–controller data
LCMUIF4 7 Line for keypad read and LCD–controller read/
write strobe
LCMUIF5 8 Line for keypad read and LCD–controller data/
instruction register selection
LCMUIF6 9 LCD–controller enable strobe
LCMCOL(3:0) 14, 13, 12, 11 Lines for keypad write
BACKLIGHTO 15 Backlights on/off (controll)
LCMXPRON 16 Power ON/OFF key
LCDD(3:0) 21, 20, 19, 18 PDA LCD Data lines
LP 22 PDA LCD, Line pulse
PCLK 23 PDA LCD, Pixel clock
FP 25 PDA LCD, Frame Pulse
DISPON 26 PDA Display on control signal
LCDVCC 27 PDA LCD Logic voltage
LCDVEE 28 PDA LCD Bias voltage (+21V)
KEYD(2:0) 31, 30, 29 Keymatrix drive lines
KEYS(1:0) 33, 32 Keymatrix sense lines
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