After Sales
Technical Documentation
RAE/RAK–1N
PDA Hardware
Page 6 – 23
Original, 08/96
EMIU
This module contains only passive components to suppress EMI
generated voltages on external signal lines.
Note 1. B2B = Board to board connector between PDA and CMT modules
Table 14. External Signals and Connections, Inputs
Signal Name Signal description From (1)
BACKLIGHTI Backlights on/off (control) B2B / Back-
light
KEYDI(2:0) Keymatrix drive lines PROCU /
KEYD(2:0)
KEYSI(1:0) Keymatrix sense lines PROCU /
KEYS(1:0)
LCDD(3:0) PDA LCD Data PROCU /
LCDD(3:0)
DISPONI PDA LCD Display on control signal PROCU /
DISPON
FPI PDA LCD Frame Pulse PROCU /
FP
PCLKI PDA LCD Pixel Clock PROCU /
PCLK
LPI PDA LCD Line Pulse PROCU /
LP
PHFMICNI Negative Hands Free MIC input B2B /
PHFMICN
PHFMICPI Positive Hands Free MIC input B2B /
PHFMICP
COL(3:0)I Lines for keypad write B2B /
COL(3:0)
UIF(3:0)I Lines for keypad read and LCD–controller data B2B /
UIF(3:0)
UIF4I Line for keypad read and LCD–controller read/write strobe B2B / UIF4
UIF5I Line for keypad read and LCD–controller data/insruction register
selection
B2B / UIF5
UIF6I LCD–controller enable srobe B2B / UIF6
MBUSI Serial bidirectional data and control between the handphone and
accesseries
B2B / MBUS
EXTMICI External audio input from accessories or handsfree microphone.
Multiplexed with junction box connection indication. 16.8k pull
down in CMT
B2B / EX-
TMIC
EXTEARI External audio output to accessories or handsfree speaker.
100k pull–down in CMT to turn on the junction box.
B2B / EX-
TEAR
Note 1. LCMCON = LCD module connector on PDA module
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