NHE6300ESB S L7XJ Intel, NHE6300ESB S L7XJ Datasheet - Page 365

• Manufacturer Part Number: NHE6300ESB S L7XJ
• Manufacturer: Intel

Specifications of NHE6300ESB S L7XJ

• Lead Free Status / RoHS Status: Compliant

8—Intel
8.4.8
Table 244. OCW2—Operational Control Word 2 Register
November 2007
Order Number: 300641-004US
Bits
Default Value:
7:5
4:3
2:0
®
Note: Following a part reset or ICW initialization, the controller enters the fully nested mode
Device:
Offset:
6300ESB ICH
Rotate and EOI Codes
Interrupt Level Select
OCW2 Select
(R, SL, EOI)
(L2, L1, L0)
OCW2—Operational Control Word 2 Register
of operation. Non-specific EOI without rotation is the default. Both rotation mode and
specific EOI mode are disabled following initialization.
31
Master Controller - 020h
Slave Controller - 0A0h
Bit[4:0]=undefined,
Bit[7:5]=001
Name
These three bits control the Rotate and End of Interrupt
modes and combinations of the two.
000 = Rotate in Auto EOI Mode (Clear)
001 = Non-specific EOI command
010 = No Operation
011 = Specific EOI Command
100 = Rotate in Auto EOI Mode (Set)
101 = Rotate on Non-Specific EOI Command
110 = *Set Priority Command
111 = *Rotate on Specific EOI Command
*L0 - L2 Are Used
When selecting OCW2, bits 4:3 = “00”
L2, L1, and L0 determine the interrupt level acted upon when
the SL bit is active. A simple binary code, outlined below,
selects the channel for the command to act upon. When the
SL bit is inactive, these bits do not have a defined function;
programming L2, L1 and L0 to 0 is sufficient in this case.
Bits
000
001
010
011
Interrupt LevelBitsInterrupt Level
IRQ0/8
IRQ1/9
IRQ2/10
IRQ3/11
Description
Attribute:
Function:
100
101
110
111
Size:
0
Write-Only
8-bit
IRQ4/12
IRQ5/13
IRQ6/14
IRQ7/15
Intel
®
6300ESB I/O Controller Hub
Access
WO
WO
WO
365
DS