2-18

Theory of Operation: VOCON Board

 

 

Controller and Memory: The dual-core processor (U401) with the microcontroller unit (MCU) and a digital signal processor (DSP) in a single integrated circuit (IC) package, the SRAM (U403) and Flash (U402) memory devices.

Audio and Power: The GCAP II (U501), a 5 Vdc linear regulator (U505), a 1.55 Vdc linear regulator, the audio pre-amplifier (U502), the audio power amplifier (U503), and the dual EEPOT (U509).

Interface Support: The digital-support IC (U301) (Flipper), ESD protection circuitry, and side connector interface circuitry.

The connector symbols represent the following:

Transceiver board connector

Universal flex connector

Internal speaker and microphone flex connector

Control top flex connector

Liquid-crystal display (LCD) board connector

Encryption module connector (optional)

INTERFACE SUPPORT

ESD Protection &

 

Digital Support IC

Side Connector

 

Clocks & Side

Circuitry

 

Connector Support

 

 

 

VOCON Board

Transceiver

Board

Universal/

Accessory

Connector

Internal

Speaker &

Microphone

AUDIO & POWER

Audio

EEPOT

Pre-amp &

Power Amp

GCAP II

&Discrete Voltage

Regulators

CONTROLLER & MEMORY

FLASH

Memory Dual-Core

Processor

MCU & DSP

SRAM

Control Top

Display

Encryption

MAEPF-27533-B

Figure 2-7. VOCON Board Block Diagram

2.5.1Interconnections

2.5.1.1 Transceiver Board Connector P201

This is a 26-pin compression connector that interfaces between the VOCON board and the transceiver board. See Section 2.4.1.2: “VOCON Connector P1” on page 2-7for a detailed description of the interface between the VOCON and transceiver boards through P201.

2.5.1.2 Universal Flex Connector J102

This is a 40-pin connector that mates with the universal flex on the housing. A majority of the lines on the connector are for user interface: emergency and side buttons (pin 14), monitor button (pin 17), secure/clear switch (pin 23), channel switch (pins 24, 25, 26, and 27), volume knob (pin 31), and the three-position toggle switch (pin 34). The LEDs on the universal flex are controlled through pins 20,

November 11, 2004

6881094C12-A

Page 40
Image 40
Motorola SSETM 5000 service manual Transceiver Board Connector P201, Universal Flex Connector J102