Universal Flex Assembly; Display Module; Keypad Module; Encryption Module - Motorola ASTRO XTS 5000 Detailed Service Manual

Overall Characteristics: Introduction
RF
26 pins
Universal
40 pins
2.1.3

Universal Flex Assembly

The universal flex assembly contains the volume/on/off switch, frequency selector switch, push-to-
talk (PTT) switch, monitor button, several function-selectable switches, universal connector, speaker,
and microphone.
2.1.4

Display Module

The display module is a 96 pixels x 64 pixels bit-mapped, liquid-crystal display (LCD) with associated
circuitry. This module uses chip-on-film technology and is not field repairable.
2.1.5

Keypad Module

The keypad module is either a 6- x 3-button (Model III) or a 2- x 3-button (Model II) module with
backlighting.
2.1.6

Encryption Module

The encryption module (secure models only) connects directly to the VOCON board and interfaces
directly with the vocoder digital circuitry. It contains an independent microcontroller and two custom
ICs to perform digital, numerical, encryption algorithms.
The encryption modules are designed to digitally encrypt and decrypt voice and ASTRO data in
ASTRO XTS 5000 radios. This section covers the following secure modules:
68P81094C31-O
INTERFACE SUPPORT
ESD Protection and
Clocks and Side
Side Connector
Connector Support
Circuitry
AUDIO AND POWER
Audio
EEPOT
Pre-amp and
Power Amp
GCAP II
and 5V Linear
Regulator

Figure 2-3. VOCON Board Interconnections

NTN4006A
NTN9837A
Flipper
CONTROLLER AND MEMORY
FLASH
8MBytes
MCU and DSP
SRAM
1MByte
NTN9838A
NTN9839A
VOCON
Board
Keypad
22 pins
Display
Patriot
22 pins
Encryption
40 pins
MAEPF-27413-O
April 15, 2002
2-3