l-fw322-06-db ETC-unknow, l-fw322-06-db Datasheet - Page 44

• 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
Bus Identification Register
The Bus Identification register externally maps to the first quadlet in the Bus_Info_Block and is addressable at
FFFF_F000_0404. This register is read locally at the offset specified below.
Offset:
Default:
Reference:
Table 27. Bus Identification Register Description
Bus Options Register
The Bus Options register externally maps to the second quadlet of the Bus_Info_Block and is 1394 addressable
at FFFF_F000_0408.
Offset:
Default:
Reference:
Table 28. Bus Options Register Description
44
44
31—0
31:16
15:12
11:3
2:0
Bit
Bit
1394 Open Host Controller Interface Specification, Rev. 1.1, Section 5.5.3
20h
0000 A002h
1394 Open Host Controller Interface Specification, Rev. 1.1, Section 5.5.4
1Ch
3133 3934h
Field Name
Field Name
Reserved
Reserved
max_rec
Lnk_spd
busID
(continued)
R or RW Reserved. Bits return 0s when read; 23:16 and 31:27 are RW and
Type
Type
RW
R
R
R
Contains the constant 32’h31333934, which is the ASCII value for
1394.
undefined.
1394 Bus Management Field. Hardware initializes this field to
indicate the maximum number of bytes in a block request packet
that is supported by the implementation. This value,
max_rec_bytes, must be 512 or greater and is calculated by
2
must be valid at any time bit 17 (linkEnable) of the Host Controller
Control register is set. A received block write request packet with a
length greater than max_rec_bytes may generate an
ack_type_error. This field is not affected by a soft reset, and
defaults to value indicating 2048 bytes on a hard reset.
Reserved. Bits 11:3 return 0s when read.
Link Speed. This field returns 010, indicating that the link speeds
of 100 Mbits/s, 200 Mbits/s, and 400 Mbits/s are supported.
(max_rec + 1)
. Software may change this field; however, this field
Description
Description
Data Sheet, Rev. 1
December 2005
Agere Systems Inc.