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Level 3 Service Manual
Circuit Description
Overview
6881039B10
3
6881039B10
Controller (Audio/Logic Circuit)
The CDMA V200 Personal Communicator chip set includes Motorola pro-
prietary call processor and audio/power controller ICs, with on-board flash
EEPROM and SRAM memory. See Figure 1 for a functional block diagram.
The 32-bit call processor IC includes the functionality of CPU, DSP, CSP, and CIA.
The audio/power controller IC works in buck mode with no 5V supply, controls the
32Khz crystal, and interfaces with the call processor over an 8-bit parallel bus.
Communication with accessories is through the CE bus connector through the
audio/power controller IC. Audio through the external connector is analog.
The V200 has an integrated speakerphone that also serves as the alert transduc-
er. The audio/power controller IC handles all the audio functions including alert/
speakerphone and headset speaker/microphone.
Key features of the Motorola call processor IC include:
• Motorola proprietary integer processor with 32-bit RISC architecture,
• 56600 NDE-UL DSP core running at up to 70 Mhz @ 1.8V,
• MCU-DSP interface,
• CDMA signal processor (CSP3) ASIC,
• 16-bit external memory interface for the MCU,
• 8-bit parallel interface for the audio/power controller IC,
• 32-input interrupt controller for the MCU,
• internal MCU ROM and RAM,
• special modules for CDMA mode (all are MCU peripherals),
• dual 9.8304 Msamples/sec 4-bit ADCs (RX I/Q with Receive AGC),
• dual 4.9152 Msamples/sec 9-bit DACs,
• 13-bit linear CODEC,
• 1 8-bit, 2 10-bit, and 1 12-bit measurement DAC,
• 8-bit measurement ADC with 6 multiplexed inputs,
• 10-bit AOC loop control ADC and DAC (DSP peripheral),
• a UART with auto baud detection,
• universal serial bus (USB) interface module, and
• serial audio port interface.
Key features of the audio/power controller IC include:
• 8-bit parallel interface from the call processor IC,
• buck and boost converters,
• 8 Linear voltage regulators,
• 2 high end linear regulators with common reference (PA drain regulators),
• external B+ clamp regulator,
• 3 microphone amplifiers,
• differential audio interfaces to and from the call processor IC,
• audio amplifiers, multiplexers, and speaker and alert drivers,
• headset and send/end key detection,
• battery charger,
• 6-input 8-bit ADC,
October 04, 2001
Circuit Description
5
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Troubleshooting
