Controller Section - Motorola MTM800 User Manual

THEORY OF OPERATION (TRANSCEIVER)

Controller Section

The controller section contains the Patriot Bravo dual core (DSP / RISC) processor and its external
memory, the TX and RX audio processing, the serial interfaces and I/O circuitry.
The Patriot Bravo controls the receive / transmit frequencies, power levels, Enhanced Control Head
display and keypad, serial interfaces, accessories, MMI, and other terminal functions. This
microprocessor can be operated through the RS232 interface by a personal computer to program
the FLASH.
The TX audio circuitry selects between the different microphone inputs, controls the TX audio level
and converts the analog audio signal to a digital format.
The RX audio circuitry converts the received signal from digital format to an analog audio signal,
performs volume control and amplifies the signal to speaker level.
The DSP performs signalling, and voice encoding and decoding.
16.8MHz 32.768kHz
ABACU S III
ADDAG
ABACU S III
ADDAG
JAVELIN
LVFRACN
ESCORT
PCIC
ADDAG_TXE
AGC_0_FE
AGC_1_FE
AGC_2_IF
LO2 ON
RESET_OUT
RESET_JAV_ADDAG
RESET_ABACUS
GPS_RESET
1.8V 1.55V
3V0
BBP
PATRIOT
UARTB
DSP
SAP
SPIA
MC U
GPIO
L1T
Mux control / PA enable
UARTA SPIB
EIM
Option Slot
24-PIN (GPS)
1.8V
J0600
Figure 4.1-5 Controller Block Diagram
On/Off
Level
shifter
& buffer
SAP
PA Temp
PWM
CESG
ADC
Memory
Battery Voltage
Option Slot
40 pin (UCM)
J0450
Level
shifter
& buffer
SPIB
RTC
J0570
SB9600 / JTAG / RS232 / USB
Front
A+
SW B+
5V
SBEP
CODEC
Mic+RXaudio,
M C145483
Speaker audio
Audio
MUX
/E2POT
AF-PA
Rear
SW B+
Key fail / flash
On/Off Ctrl
I/O
Ignition / Emergeny
4 wire
8 wire
SAP
4.1 - 9
J0550
Mic
ON_OFF_
CTRL
12
pin
J0400
Emergency
Ext. Alarm
Ext. PTT
Ignition
Mic
16
+
4 pin
Front
Switched
J0500
by internal
Patriot
40
register
pin
(GPCR )