W83628AG Nuvoton Technology Corporation of America, W83628AG Datasheet - Page 29

• Manufacturer Part Number: W83628AG
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83628AG

• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Rad Hardened: No
• Lead Free Status / RoHS Status: Compliant

Address Offset:
Default Value:
Attribute:
Bit [31:24]
Bit [23:14]
Bit [13:12]
Bit 11
Bit 10
Bit [9:8]
Bit[7:0]
10.10
High Page Base Address of Fast Memory Decoder #0:
PCI A[31:24]. W83628AG will relocate the access within Fast Memory Decoder to ISA
bus, but the A[31:24] will be ignored since ISA has SA[23:0] only.
Low Base Address of Fast Memory Decoder #0:PCI A[23:14]
Reserved.
Enable/Disable Fast Memory Decoder #0
1=Enable, 0=Disable
Enable Fast Memory Decoder #0 High Page Address A[31:24] Comparison
Function.
1=Enable, 0=Disable
Fast Memory Decoder #0
00=Subtractive speed, 01= Slow speed, 10=Medium speed, 11=Fast speed
Fast Memory Decoder#0 Mask Control
Bit[7:0] is used to mask PCI address bits of A[23:14], respectively. If the corresponding
bit of the register is set to 1 (one), the corresponding address bits [23:14] are ignored by
the Fast Memory Address Decoder #0. The following example will show the Fast
Memory Decoder #0 size setting. If bit[7:0] = 00h, the size is 16K bytes. If bit[7:0]=01h,
the size is 32K bytes. If bit[7:0]=7fh, the size is 2M bytes. If bit[7:0]=ffh, the size is 4M
bytes.
BRIDGE FAST MEMORY DECODER #0 CONTROL REGISTERS
47h_46h_45h_44h
00h_00h_02h_00h
Read/Write
- 24 -
W83628AG & W83629AG
Publication Release Date: January, 2008
Revision 1.2