User Manual
Table Of Contents
- Introduction to the Integrator's Manual
- Integrating the CM52 Module
- Recommended Circuitry
- Functional Description
- Hints for Integrating the Module
- Antenna Type
- Antenna Placement
- Possible Communication Disturbances
- Technical Data
Confidential
USERS MANUAL
29(42)
Document number Revision
4/198 17-LXE 108 566 Uen PA7
3 Recommended Circuitry
Abbreviations:
•
VCC - Represents the logic supply voltage used by the application.
•
VREF - Current amplified reference voltage used as supply voltage for all logic
interface circuitry.
Component proposals:
•
Transistors not showing a base resistor should be interpreted as a BRT (Built in
Resistor Transistor) i.e. Toshiba RN1308.
•
The inverting buffers should preferably be Schmitt-Triggered, i.e. Toshiba TC7S14
or similar.
3.1 Status Group Recommended Circuitry
The status group contains four signals, one output signal from the application and three
input signals to the application.
Phone ModuleApplication
12, MODULE_PWR_EN_B
0 = Phone Module Power OFF
1 = Phone Module Power ON
+
-
0
0 - 1k
0 -10 ohm
5V
2, VREF
1M
10uF
VREF
5V
VREF
40, RI
1 - 100k
VCC
Ring Indicator
24, RINGER
VCC
15, HW_SD
100
Shutdown Request
Shutdown Indicate