Motorola Astro XTL 5000 Basic Service Manual

6881096C73-O June 11, 2003
Basic Theory of Operation: Surrounding Controller Region 3-3
3.4.1 Microprocessor
The microprocessor consists of an MCORE-based controller and a DSP that communicates with the
memory ICs via a 16-bit data bus. It also communicates to peripheral ICs on the main board via an
SSI and SPI bus. This microprocessor contains a fixed amount of one-time programmable ROM and
a small section of RAM. However, the microprocessor does not contain the radio software setting as
programmed in the Customer Programming Software (CPS) or the firmware as installed at the
factory. The only purpose of this IC is for interpretation and processing of the content inside the
FLASH IC. Therefore, this part may be replaced as is without the need to reflash the radio.
There are six clocks supplied to the daughtercard, a 16.8 MHz master clock (CKIH), a 32 kHz real-
time clock (CKIL), a 20 kHz RX frame-sync clock, a 48 kHz TX frame-sync clock, a 1.2 MHz RX data
clock, and a 2.4 MHz TX data clock. The microprocessor also generates the digital audio bus clocks:
a 512 kHz data clock and an 8 kHz frame-sync clock.
3.4.2 FLASH IC
The FLASH IC is the firmware storage IC. Programming this IC is accomplished using one of three
input paths:
• 2-wire RS232 directly from a computer's serial port to the radio’s rear connector data cable,
HKN6160
• 2-wire RS232 through an HKN6155 programming cable at the control head’s 10-pin
microphone port
• 2-wire RS232 through an HKN6155 programming cable at the Remote Mount Interconnect
board’s 10-pin flash port.
NOTE: In remote-mount configurations, the control head 10-pin microphone port is disabled for any
kind of programming.
NOTE: It is recommended thatFLASH IC replacement is not supported as a field repair option. If this
part is removed, the radio must be reflashed and retuned. This is because the FLASH IC must
be hard-boot loaded at the factory to allow the programming of a unique file.
3.4.3 SRAM IC
The SRAM IC is only used by the microprocessor to perform its memory operations and is not
upgradeable to a larger SRAM IC.
3.5 Surrounding Controller Region
3.5.1 Introduction
The surrounding controller region contains the regulated power, audio, and data translation
hardware.
This hardware allows a computer to program the radio's features, maintain an active control of the
RF sections, and make necessary mode and audio adjustments as related to feedback from a
control head device.
if you choose to reflash the radio (reflash the IC), DO NOT interrupt the
process; otherwise, you might corrupt the FLASH IC and need advanced
technical support to revive your radio.
!
C a u t i o n

Motorola Astro XTL 5000 Specifications

General

Brand	Motorola
Model	Astro XTL 5000
Category	Radio
Language	English