November 16, 2006
6881094C31-E
3-24
3.2.3
Audio and Power
The audio and power section contains the following components:
• GCAP II IC U501
• 5 V regulator U505
• 1.55 V regulator (NNTN4717 VOCON board only)
• Audio pre-amplifier U502
• Audio power amplifier U503
• EEPOT U509
• MAKO IC U501 (for kit NNTN5567A)
•
VSW1 Driver IC Q502 (for kit NNTN5567A)
The GCAP II IC contains a CODEC, amplification, filtering and multiplexing capability for receive and
transmit audio, voltage regulators, an analog-to-digital converter (ADC), and a real-time clock (RTC).
The GCAP II IC is programmed by the Patriot IC.
On NNTN5567, the audio and power supply functionality is carried out by the MAKO IC U501. It
supplies all of the voltages used on the VOCON board with its voltage regulators. It also has
microphone audio amplifiers, multiplexing capability for receive and transmit audio, switching
between internal and accessory microphones, switching between internal and external speaker,
filtering, and the audio CODEC. The MAKO IC also has an analog/digital converter (ADC). The
MAKO IC is programmed by the Patriot IC.
The audio pre-amplifier and the audio power amplifier condition the received audio signal before
being routed to the speaker. The dual EEPOT sets the gain of the microphone signal. These devices
are programmed by the Patriot IC.
On NNTN5567, the audio pre-amplifier and audio PA are integrated into the MAKO IC. The pre-
amplifier and PA condition the received signal from the analog output of the MAKO IC CODEC
before the audio is routed to the internal/external speaker. The microphone gain stages are also
integrated into the MAKO IC. The microphone gain stages, audio pre-amplifier, and PA are
programmed by the dual-core processor.
NOTE:
Refer to
Table 8-2, “List of VOCON Schematics and Board Overlays,” on page 8-1
of audio and power-related schematics that will aid in the following discussion.
3.2.3.1 GCAP II IC U501
The GCAP II IC is a mixed-signal (analog and digital) IC that provides control, audio, and voltage
regulation functionality. It comes in a 100-pin, ball-grid array (BGA) package with 0.8 mm pitch solder
balls. The GCAP II IC is supplied with switched battery voltage (R581).
3.2.3.1.1 Voltage Regulation
The GCAP II IC contains several voltage regulators that are used in the design of the VOCON board:
VSW1, VSW2, and V2. The VSW1 regulator is a programmable switching regulator that uses the
switched battery voltage as its input on pin PSRC1. The output voltage of VSW1 (R502) is
programmable by the Patriot IC U401 through the SPI bus. The initial output of VSW1 is 3.2 volts,
which is then programmed to 3.8 volts. The VSW1 voltage is supplied to the RF Interface connector
P201 pin 15 and to the input pins of the VSW2 and V2 regulators.
Summary of Contents for ASTRO XTS-5000
Page 7: ...vi Table of Contents November 16 2006 6881094C31 E Notes ...
Page 11: ...x List of Figures November 16 2006 6881094C31 E Notes ...
Page 17: ...November 16 2006 6881094C31 E xvi CommercialWarranty Notes ...
Page 31: ...November 16 2006 6881094C31 E xxx Portable Radio Model Numbering System Notes ...
Page 83: ...November 16 2006 6881094C31 E 3 44 Theory of Operation Encryption Module ...
Page 135: ...November 16 2006 6881094C31 E 5 44 Troubleshooting Charts Secure Hardware Failure Notes ...
Page 175: ...November 16 2006 6881094C31 E 7 32 Troubleshooting Tables List of Board and IC Signals Notes ...
Page 367: ...November 16 2006 6881094C31 E Glossary 10 Notes ...
Page 373: ...Index 6 November 16 2006 6881094C31 E Notes ...