LSI53C040-160QFP LSI, LSI53C040-160QFP Datasheet - Page 51

• Manufacturer Part Number: LSI53C040-160QFP
• Manufacturer: LSI

Specifications of LSI53C040-160QFP

• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Supplier Unconfirmed

2.10.7 Interrupt Service Routine
Table 2.6
Number
ISR Bit
7
6
5
4
SCSI core
Two-wire serial port 0
Two-wire serial port 1
DMA core
Interrupt Handling
Interrupt Source
When the microcontroller core receives an interrupt, it reads the
Status (ISR)
Once it determines the source of the interrupt, it reads the appropriate
bits for determining the exact cause of the interrupt. This activity is
described in
Interrupts
Table
register (0xFE04) to determine the source of the interrupt.
BSR (0xFC05)
CSBS (0xFC04)
CSD (0xFC00), CSDHI
(0xFC08)
Status (0xFD01)
Status (0xFD03)
DMAI (0xFC14)
2.6.
determine cause of
Location to read to
interrupt
Monitors SCSI bus control
signals not found in CSBS,
plus six other status bits.
Monitors SCSI bus control
lines plus data parity bit.
Reads the active SCSI bus.
Contains PIN bit plus other
status bits.
Contains PIN bit plus other
status bits.
Enables DMA interrupt.
Description
Interrupt
2-33