The interconnection between the LCD module and the PWB engine is implemented with a 50-pin board-to-
board connector. Display is controlled via LCD controller using VISSI interface (video interface). The display
module does not require any tunings. Display backlights are powered with discrete SMSP.
HW keys
The device HW keys are located in flex, which is connected to the main PWB with a board-to-board connector.
The key matrix has three rows and five columns, which is connected to the TSC2303’s integrated keyboard
block.
Dome
Measured between connector pi
S4301
Power
1 - 10
S4312
Vol
4 – 8
S4311
Full screen
3 - 8
S4310
Vol+
2 – 8
S4303
Up
3 – 7
S4304
Right
4 – 6
S4306
Left
2 - 6
S4307
Down
3 – 5
S4305
Select
3 – 6
S4309
Back
2 – 5
S4308
Menu
4 – 5
S4302
Home
4 – 7
Figure 60 UI flex layout
Indication LEDs
Blue LEDs, which are placed under 5-selection key, are used to indicate the status of the device mainly when
the display has been turned off.
RX-34
System Module
Issue 2
COMPANY CONFIDENTIAL
Page 9 –9
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