Figure 2.3 Reciter Risc Functional Block Diagram - Tait TB8100 Service Manual

Figure 2.3 Reciter RISC functional block diagram
Alarm LEDs
Reciter
Hex Switch
Status
Flash Programming Voltages
Flash
Address, Data, Control
RAM
Interrupt
DSP
Interrupt
Main Loop
Debug LEDs
Test
DIP Switch
SPI
Chip Selects
40MHz
Lock Detects
Clock
Digital Board
TB8100 Service Manual
© Tait Electronics Limited September 2006
debug LEDs
fan good input
flash programming voltage control.
The RISC has the following serial interfaces:
asynchronous serial port for communication with the Service Kit,
Calibration Kit, Alarm Center, and Ethernet interface
serial peripheral interface (SPI) for programming the synthesizers
SPI for communication with the system interface board
2
I C for communication with the control panel and other modules in the
subrack.
RISC
- ARM 7 Processor
- Drivers
- SPI
- UART
- Timers
- Watchdog
- Discrete I/O
- Interrupts
2
I C
System
UART
Control
Fan Good
Bus
SPI
Select
System
Rx Gate
Interface
Tx Relay
Board
Tx Key
Detect
External
Reference
Detect/
Select
Select
10MHz or
12.8MHz
Synthesizers
Lock Detects
SPI
Chip Selects
40MHz
Reciter Circuit Description
System Control Bus to
Base Station Modules
& Control Panel
System I/O
10MHz or
12.8MHz External
12.8MHz
Internal TCXO
Rx L.O.
Ex L.O.
12.8MHz
RF Board
33