S5920Q Applied Micro Circuits Corporation, S5920Q Datasheet - Page 99

• Manufacturer Part Number: S5920Q
• Manufacturer: Applied Micro Circuits Corporation

Specifications of S5920Q

• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Package Type: PQFP
• Rad Hardened: No
• Lead Free Status / Rohs Status: Not Compliant

S5920 – PCI Product: Initialization
Figure 44. Type 0 Configuration Write Cycles
Table 50. PC Compatible Expansion ROM
AMCC Confidential and Proprietary
PCI CLK
FRAME#
AD[31:0]
C/BE[3:0]#
IRDY#
TRDY#
IDSEL
DEVSEL#
Byte Offset
1Ah-3Fh
18h-19h
7h-17h
4Ch
4Dh
4Eh
40h
42h
44h
45h
46h
48h
49h
4Fh
0h
1h
2h
3h
0
Byte Length (decimal)
12345
ADD
1011
17
38
1
1
1
4
2
2
2
1
1
2
1
3
1
1
1
1
BYTE EN
DATA
S5920 Special
Binary Value
your header
Revision ID
class code
self-test, if
Vendor ID
Device ID
not used
not used
not used
not used
variable
variable
variable
variable
variable
desired
Modes
AAh
type
55h
EXPANSION BIOS ROMS
This section provides an example of a typical PC-com-
patible expansion BIOS ROM. Address offsets 040h
through 07Fh represent the portion of the external nv
memory used to boot-load the S5920 controller.
Whether the expansion ROM is intended to be execut-
able code is determined by the contents of the first
three locations (starting at offset 0h) and a byte check-
sum over the defined length. The defined length is
specified in the byte at address offset 0002h. Table 2
lists each field location by its address offset, its length,
its value, and description.
The following represents the boot-load image for the
S5920 controller’s PCI configuration register:
BIOS ROM signature byte 1
BIOS ROM signature byte 2
Length in multiples of 512 bytes
Entry point for INIT function.
Reserved (application unique data)
Pointer to PCI Data Structure
user-defined
(see page 2-23)
(see page 2-24)
(see page 2-89 and 2-129)
(see page 2-29)
(see page 2-30)
(see page 2-37)
(see page 2-38)
Description
Revision 1.02 – April 12, 2007
Data Book
DS1596
80h or 00h
Example
FF0000h
10E8h
5920h
xxxxh
AAh
55h
01h
01h
00h
00h
xxh
xxh
xxh
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