W90221X Winbond Electronics Corp America, W90221X Datasheet - Page 170

• Manufacturer Part Number: W90221X
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

Data FIFO Register (DFIFO)
Port address: 0xf0000380
Bit 7
Bits 8-15
W90221X version 0.6
0
8
1
9
Always ROM cycle
Upon setting this bit to logic one, all following PCI accesses will be
redirected to WIO memory (ROM/Flash) accesses. This bit is set after
each cold start so that the chip's initialization (ROM access) will be
redirected to WIO bus where the code ROM attached. Turn off this bit
once the other PCI or WIO devices needed to be enabled.
WIO memory space base address
This register defines the starting address of WIO memory space on a
16M boundary. As the high byte address lines of PCI accesses match
the WMBASE[0:7], WIO controller responds DEVSEL_ and TRDY_ to
PCI bridge and issues a memory access cycle to WIO memory
devices.
10
2
Access type: read/write
Reserved
WMBASE[0:7]
11
3
12
4
13
5
14
6
Default: 0x---
RAWS
15
7
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