NH82801DB S L8DE Intel, NH82801DB S L8DE Datasheet - Page 150

• Manufacturer Part Number: NH82801DB S L8DE
• Manufacturer: Intel

Specifications of NH82801DB S L8DE

• Lead Free Status / RoHS Status: Compliant

Functional Description
5.12.9.2
150
Addr
20h
I/O
Table 5-46. Write Only Registers with Read Paths in ALT Access Mode (Sheet 2 of 2)
Table 5-47. PIC Reserved Bits Return Values
Rds
# of
12
Access
NOTES:
PIC Reserved Bits
Many bits within the PIC are reserved, and must have certain values written in order for the PIC to
operate properly. Therefore, there is no need to return these values in ALT access mode. When
reading PIC registers from 20h and A0h, the reserved bits shall return the values listed in
Table
10
11
12
1. The OCW1 register must be read before entering ALT access mode.
2. Bits 5, 3, 1, and 0 return 0.
1
2
3
4
5
6
7
8
9
Restore Data
5-47.
PIC ICW2 of Master controller
PIC ICW3 of Master controller
PIC ICW4 of Master controller
PIC OCW1 of Master controller
PIC OCW2 of Master controller
PIC OCW3 of Master controller
PIC ICW2 of Slave controller
PIC ICW3 of Slave controller
PIC ICW4 of Slave controller
PIC OCW1 of Slave controller
PIC OCW2 of Slave controller
PIC OCW3 of Slave controller
PIC Reserved Bits
OCW2[4:3]
OCW3[4:3]
ICW2[2:0]
ICW4[7:5]
ICW4[3:2]
OCW3[7]
OCW3[5]
ICW4[0]
Data
1
1
Addr
D0h
I/O
# of
Rds
Value Returned
6
Reflects bit 6
Access
000
000
00
00
01
0
0
1
2
3
4
5
6
Restore Data
DMA Chan 4–7 Command
DMA Chan 4–7 Request
DMA Chan 4 Mode: Bits(1:0) = 00
DMA Chan 5 Mode: Bits(1:0) = 01
DMA Chan 6 Mode: Bits(1:0) = 10
DMA Chan 7 Mode: Bits(1:0) = 11.
Intel
®
82801DB ICH4 Datasheet
Data
2