Flash Programming; Figure 3-50. Xtl 5000 Tx Signal Path; Figure 3-51. Boot Rx And Boot Tx Data Lines - Motorola ASTRO Digital XTL 5000 Detailed Service Manual

Theory of Operation: Controller Section
Patriot
U100
SCKA
SRDA
SCKA
512kHz
TX Data
8kHz
After the DSP has finished its processing, filtering, and signaling on the audio data samples, it then
sends this data to the modulation DAC (U0900) on the BBP SSI port, where it is converted to the
analog modulation signal. The data is clocked over to the modulation DAC at a 2.4 MHz bit rate, with
a frame sync (representing the transmit data sample rate) of 48 kHz. Both of these clocks are
generated by the Urchin IC (U0901).
The modulation DAC audio output signal is sent to a switched capacitor low-pass filter (FL0900) that
performs anti-aliasing filtering. The filter output is sent through a multiplexer switch, U0902, and
finally on to the FGU/LV Frac-N synthesizer for modulation of the RF carrier signal.

3.8.12 Flash Programming

When the radio needs new program code, this can often be done by reflashing the FLASH ROM
(U102) located on the daughtercard. Reflashing is accomplished by using a programming cable
(HKN6155 for Mid Power or HKN6183 for High Power) and the Motorola Customer Programming
Software (CPS) FLASHport tool. The technique to flash the radio is the same as when using CPS or
the TUNER software to change features on your radio. Two data lines are utilized on the
programming cable to allow the computer to communicate with the microcontroller. These two lines
are called BOOT TX (J0401-25), and BOOT RX (J0401-26) (see
6881096C74-B
SPI
S PI_SC
SPI_MOSI
SPI_MISO
2.4MHz
SCKB
SAP BBP
MOD Data
STDB
48kHz
SC2B
CODEC
U0200
MCLK
TG
DT
FSR

Figure 3-50. XTL 5000 TX Signal Path

Computer 9 pin cable
(male) pin 2 (female) pin 2
(RX_DTE) (TX_DCE)
9 pin cable
Computer
(female) pin 3
(male) pin 3
(RX_DCE)
(TX_DTE)

Figure 3-51. Boot RX and Boot TX Data Lines

URCHIN Clock
IC
2.4MHz
U0901
48kHz
Modulation DAC
SCK
U0900
STD
SFS
Gain/Attenuation
Stages (U0201, U202)
Figure
10 pin cable
Tout Tin
(female) pin 10
14 11
(TX_DCE)
RS232 IC
10 pin cable
13 12
(female) pin 2
Rin Rout
(RX_DCE)
HKN6155
Low Pass Filter
FL0900
Input Output
FM OUT
MODIN
(To LV FRACN)
MIC_HI
(J0401-4)
MAEPF-27890-O
3-51).
Boot_TX
Controlhead
plug P104
or
Remote Mount
faceplate
plug P506
Boot_RX
MAEPF-27815-O
May 25, 2005
3-75