6871620L01-C
May 28, 2008
VOCON Section
3-13
3.2
VOCON Section
This section provides a detailed circuit description of the ASTRO XTS 4000 VOCON section.
The VOCON section (see
) is divided into the following sections:
• Controller and Memory
• Audio and Power
• Accessory and CE Interface Connector Support
3.2.1
Connections
The VOCON section (
) contains three functional blocks and three connector symbols.
Figure 3-6. VOCON Section Connections
The functional blocks consist of the following:
•
Controller and Memory:
The Patriot (U1401), the dual-core processor with the microcontroller
unit (MCU) and a digital signal processor (DSP), the 4MB SRAM (U1409) and 8MB Flash
(U1410) memory devices.
•
Audio and Power:
The MAKO IC (U1304), a 5Vdc linear regulator (U1101), an audio switch IC
(U20) and a single-ended gain stage (U9904)
•
Accessory and CE Interface Connector Support:
The MAKO IC (U1304), ESD protection
circuitry, and CE connector interface circuitry.
NOTE:
Table 8.1, “List of Schematics and Boards Overlays,” on page 8-1
for a listing of
VOCON schematics that will aid in the following discussion.
MAKO
SSI
SPI
RTC
DA or AD
Converter
DC Regulators
Accessory
Interface
Audio P.A.
Voice Codec
Power
Management
CONTROLLER AND MEMORY
FLASH
8 MBytes
Dual-Core
Processor
MCU and DSP
SRAM
4 MBytes
Loud Speaker
Audio Jack
30 pins
CE
Connector
30 pins
VOCON
Encryption
Module
30 pins
XCVR
Display &
Keypad
60 pins
Controls &
Buttons
16 pins
Earpiece
60 pins
I/O
Summary of Contents for ASTRO XTSTM 4000
Page 1: ...COLOR CHORDS 7 ASTRO XTSTM 4000 Portable Radio Detailed Service Manual ...
Page 2: ......
Page 16: ...May 28 2008 6871620L01 C xiv Commercial Warranty Notes ...
Page 22: ...May 28 2008 6871620L01 C 1 6 Introduction Notes ...
Page 26: ...May 28 2008 6871620L01 C 2 4 Radio Power Notes ...
Page 56: ...May 28 2008 6871620L01 C 3 30 Theory of Operation Notes ...
Page 100: ...May 28 2008 6871620L01 C 6 8 Troubleshooting Waveforms Notes ...
Page 194: ...May 28 2008 6871620L01 C B 2 Motorola Service Centers Notes ...
Page 204: ...May 28 2008 6871620L01 C Glossary 10 Glossary Notes ...
Page 209: ......