l-fw322-06-db ETC-unknow, l-fw322-06-db Datasheet - Page 28

• Manufacturer Part Number: l-fw322-06-db
• Description: Phy/link Open Host Controller Interface
• Manufacturer: ETC-unknow

FW322 06 1394a
PCI PHY/Link Open Host Controller Interface
Internal Registers
Latency Timer and Cache Line Size Register
The Latency Timer and Class Cache Line Size register is programmed by host BIOS to indicate system cache line
size and the latency timer associated with the FW322. If a serial EEPROM is detected, then the contents of this
register are loaded from the serial EEPROM interface after a PCI reset. If no serial EEPROM is detected, then this
register returns a default value of 0000h.
Offset:
Default:
Type:
Reference:
Table 7. Latency Timer and Class Cache Line Size Register Description
Header Type and BIST Register
The Header Type and BIST register indicates the FW322 PCI header type.
Offset:
Default:
Type:
Reference:
Table 8. Header Type and BIST Register Description
28
28
15:8
15:8
7:0
7:0
Bit
Bit
LATENCY_TIMER
CACHELINE_SZ
HEADER_TYPE
0Ch
0000h
Read/write
PCI Local Bus Specification, Rev. 2.2, Section 6.2.4
0Eh
0000h
Read only
PCI Local Bus Specification, Rev. 2.2, Sections 6.2.1 and 6.2.4
Field Name
Field Name
BIST
(continued)
Type
Type
RW
RW
R
R
PCI Latency Timer. The value in this register specifies the latency
timer, in units of PCI clock cycles, for the FW322. When the FW322 is
a PCI bus initiator and asserts FRAME, the latency timer begins
counting from zero. If the latency timer expires before the FW322
transaction has terminated, then the FW322 terminates the transac-
tion when its PCI_GNTN is deasserted.
Cache Line Size. This value is used by the FW322 during memory
write and invalidate, memory read line, and memory read multiple
transactions.
Built-In Self-Test. The FW322 does not include a built-in self-test;
thus, this field returns 00h when read.
PCI Header Type. The FW322 includes the standard PCI header, and
this is communicated by returning 00h when this field is read.
Description
Description
Data Sheet, Rev. 1
December 2005
Agere Systems Inc.