User Guide

Signal
name
From To Parameter Min Typ Max Unit Function
VCXOTEMP RF-IC Litepl
us
Input
voltage
range
0 2.7 V
Input
resistance
900 6000 Ohm
Resolution 10 bits
PATEMP RF-IC Litepl
us
Voltage at
-20oC
1.57 V Usage depends of the
RF design
LCD interface
The display is controlled by phone processor UPP.
The LCD module is connected to the PWB by a 24-pin Board-to-Board connector.
Keyboard
A 5 X 4 matrix keyboad consists of 21 keys, one 10-channel integrated passive filter arrays with downstream
ESD protection of >8KV connect the matrix keyboard to UPP.
Figure 115 Keyboard schematics
RM-512; RM-513; RM-514; RM-515; RM-543
System Module
Page 6 –14 COMPANY CONFIDENTIAL Issue 2
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