PCI2250 Datasheet, PDF (52/85 Pages) Texas Instruments – PCI-TO-PCI BRIDGE

5.2 Extended Diagnostic Register
The extended diagnostic register is read or write and has a default value of 00h. Bit 0 of this register is used to reset
both the PCI2250 and the secondary bus.
Bit
Name
Type
Default
7
6
5
4
3
2
1
0
Extended diagnostic
R
R
R
R
R
R
R
W
0
0
0
0
0
0
0
0
Register:
Type:
Offset:
Default:
Extended diagnostic
Read-only, Write-only
41h
00h
Table 5–2. Extended Diagnostic Register
BIT TYPE
FUNCTION
7–1
R Reserved. Bits 7–1 return 0s when read.
Writing a 1 to this bit causes the PCI2250 to set bit 6 of the bridge control register (offset 3Eh, see Section 4.32) and then
0
W _{internally reset the PCI2250. Bit 6 of the bridge control register will not be reset by the internal reset. Bit 0 is self-clearing.}
5–2