NHE6300ESB S L7XJ Intel, NHE6300ESB S L7XJ Datasheet - Page 323

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

Specifications of NHE6300ESB S L7XJ

• Lead Free Status / RoHS Status: Compliant

8—Intel
8.1.17
Table 197. Offset 64h: SERIRQ_CNTL—Serial IRQ Control (LPC I/F—D31:F0)
November 2007
Order Number: 300641-004US
Bits
Default Value:
5:2
1:0
7
6
Lockable:
®
SFPW: Start Frame Pulse
Device:
Offset:
6300ESB ICH
SIRQMD: Serial IRQ
SIRQEN: Serial IRQ
SIRQSZ: Serial IRQ
Mode Select
Frame Size
Offset 64h: SERIRQ_CNTL—Serial IRQ Control
(LPC I/F—D31:F0)
Enable
31
64h
10h
No
Name
Width
0 = The buffer is input only and internally SERIRQ will be a 1.
1 = Serial IRQs will be recognized. The SERIRQ pin will be
0 = The serial IRQ machine will be in quiet mode.
1 = The serial IRQ machine will be in continuous mode.
NOTE: For systems using Quiet Mode, this bit should be set
Fixed field that indicates the size of the SERIRQ frame. In the
Intel
frames (0100). This is an offset from a base of 17 which is
the smallest data frame size.
This is the number of PCI clocks that the SERIRQ pin will be
driven low by the serial IRQ machine to signal a start frame.
In continuous mode, the Intel
start frame for the number of clocks specified. In quiet mode,
the Intel
number of clocks specified minus one, as the first clock was
driven by the peripheral.
00 = 4 clocks
01 = 6 clocks
10 = 8 clocks
11 = Reserved
configured as SERIRQ.
®
6300ESB ICH, this field needs to be programmed to 21
to 1 (Continuous Mode) for at least one frame after
coming out of reset before switching back to Quiet
Mode. Failure to do so will result in the Intel
6300ESB ICH not recognizing SERIRQ interrupts. In
order to enable UARTS, the LPC Master should be
programmed to be in continuous mode. UART by
default will be programmed to be in continuous mode.
®
6300ESB ICH will drive the start frame for the
Power Well:
Description
Attribute:
Function:
®
Size:
6300ESB ICH will drive the
0
Read/Write
8-bit
Core
Intel
®
®
6300ESB I/O Controller Hub
Access
R/W
R/W
R/W
R/W
323
DS