GE ALPS - Cpu Board

3-12 ALPS Advanced Line Protection System
GE Power Management
3.3 PRINTED CIRCUIT BOARD MODULES 3 HARDWARE DESCRIPTION
3
3.3.10 960 CPU BOARD
The 960 CPU board contains the 960 processor, EEPROM for storage of user settings, CAPRAM for storage of fault data
and oscillography, and controls data transfer to other modules. The following functions are performed by the CPU board:
• Scheme Logic
• Test Mode
• Peripheral Protection Trip Logic
• Digital Output Logic
• Fault Reporting
• Power System Alarming
• Communications and Printer Control
The figure below contains the block diagram of the CPU logic.
Figure 3–10: BLOCK DIAGRAM OF THE SYSTEM PROCESSOR (i960 CPU)
EEPROM
32K x 8
CAP-
BACKED
REAL
TIME
CLOCK
TIMER
COUNTER
CAP-
BACKED
RAM
128K x 16
(512K x 16)
i960
PROGRAM
FLASH
MEMORY
STATIC
RAM
WDT
CLOCKOUT
COUNTER
CLOCK
GENERATOR
24.576 MHz
INTERRUPT
ENCODER
SYS-DAT
TRANSCEIVER
BUFFER
MEMORY
CONTROLLER
SYS-ADD
BUFFER
RESET
CLOCK
ADDRESS
DATA
CONTROL
XINT
BUFFER
LATCH
TRANSCEIVER
LOCAL DATA BUS
LOCAL ADDRESS BUS
DATA BUS
PIPELINED / BURST
ADDRESS BUS
SYSTEM ADDRESS BUS
CHIP SELECTS
BYTE ENABLE
SIGNALS
SYSTEM BUS
CONTROLS
SIGNALS
SYSTEM BUS
INTERRUPT