Sym53C040 Block Diagram - LSI Symbios SYM53C040 Technical Manual

Figure 2.1

SYM53C040 Block Diagram

External Firmware
Storage and/or
Two-Wire Peripheral
Devices
Two-Wire Two-Wire
80C32
16 K SRAM
Serial Serial
Microcontroller
Interface Interface
Microcontroller
Address/Data Bus
External RAM or
ROM (Optional)
SYM53C80- Multiplexed
DMA
Based I/O Register Set
Function
SCSI Control (Accessible by
Logic Firmware Only)
SFF8067 Mode
Mux
Control Logic
External Control of
SE Two SSF8067
Sensors, LEDs, etc.
or LVD 8-Bit Bidirectional
or
SCSI Bus Connections
2-2 Functional Description