Avago Technologies LSI53C1030 - Manual (Page 58)

2-28 Functional Description
Version 2.2 Copyright © 2001, 2002, 2003 by LSI Logic Corporation. All rights reserved.
2.7 Zero Channel RAID
Zero channel RAID (ZCR) capabilities enable the LSI53C1030 to
respond to accesses from a PCI RAID controller card or chip that is able
to generate ZCR cycles. The LSI53C1030’s ZCR functionality is
controlled through the ZCR_EN/ and the IOPD_GNT/ signals. Both of
these signals have internal pull-ups and are active LOW.
The ZCR_EN/ signal enables ZCR support on the LSI53C1030. Pulling
ZCR_EN/ HIGH disables ZCR support on the LSI53C1030 and causes
the LSI53C1030 to behave as a normal PCI-X to Ultra320 SCSI
controller. When ZCR is disabled, the IOPD_GNT/ signal has no effect
on the LSI53C1030 operation.
Pulling ZCR_EN/ LOW enables ZCR operation. When ZCR is enabled,
the LSI53C1030 responds to PCI configuration cycles when the
IOPD_GNT/ and IDSEL signal are asserted. Connect the IOPD_GNT/
pin on the LSI53C1030 to the PCI GNT/ signal of the external I/O
processor. This allows the I/O processor to perform PCI configuration
Table 2.5 PCI Configuration Record in Serial EEPROM
EEPROM Address Configuration Data
0x00 PCI Function [0] Subsystem ID , bits [7:0]
0x01 PCI Function [0] Subsystem ID , bits [15:8]
0x02 PCI Function [0] Subsystem Vendor ID , bits [7:0]
0x03 PCI Function [0] Subsystem Vendor ID , bits [15:8]
0x04 PCI Diagnostic Memory Size
0x05 Reserved
0x06 PCI Function [1] Subsystem ID , bits [7:0]
0x07 PCI Function [1] Subsystem ID , bits [15:8]
0x08 PCI Function [1] Subsystem Vendor ID , bits [7:0]
0x09 PCI Function [1] Subsystem Vendor ID , bits [15:8]
0x0A Checksum