FW82801E S L5AW Intel, FW82801E S L5AW Datasheet - Page 39

• Manufacturer Part Number: FW82801E S L5AW
• Manufacturer: Intel

Specifications of FW82801E S L5AW

• Lead Free Status / RoHS Status: Not Compliant

Advance Information Datasheet
Table 11. PCI Interface Signals (Sheet 3 of 3)
/GPIO[17]#
GNT[3:0]#
/GPIO[16]
/GPIO[17]
/GNT[B]#
PCIRST#
/GNT[5]#
PLOCK#
REQ[A]#
REQ[B]#
/REQ[5]#
GNT[A]#
GNT[B]#
/GNT[5]#
/GPIO[0]
/GPIO[1]
PCICLK
SERR#
Name
Type
I/O
O
O
O
I
I
I
PCI Grants: The 82801E C-ICH supports up to four masters on the PCI bus.
Pull-up resistors are not required on these signals. If pullups are used, they should
be tied to the Vcc3_3 power rail. GNT[B]#/GNT[5]#/GPIO[17] has an internal
pull-up.
PCI Clock: This is a 33 MHz clock. PCICLK provides timing for all transactions on
the PCI Bus.
PCI Reset: 82801E C-ICH asserts PCIRST# to reset devices that reside on the PCI
bus. The 82801E C-ICH asserts PCIRST# during power-up and when S/W initiates
a hard reset sequence through the RC (CF9h) register. The 82801E C-ICH drives
PCIRST# inactive a minimum of 1 ms after PWROK is driven active. The 82801E
C-ICH drives PCIRST# active a minimum of 1 ms when initiated through the RC
register.
PCI Lock: PLOCK# indicates an exclusive bus operation and may require multiple
transactions to complete. 82801E C-ICH asserts PLOCK# when it performs
non-exclusive transactions on the PCI bus.
System Error: SERR# can be pulsed active by any PCI device that detects a
system error condition. Upon sampling SERR# active, the 82801E C-ICH has the
ability to generate an NMI, SMI#, or interrupt.
PC/PCI DMA Request [A:B]: This request serializes ISA-like DMA Requests for
the purpose of running ISA-compatible DMA cycles over the PCI bus. This is used
by devices such as PCI-based Super I/O or audio codecs that need to perform
legacy 8237 DMA but have no ISA bus.
When not used for PC/PCI requests, these signals can be used as General
Purpose Inputs. Instead, REQ[B]# can be used as the fifth PCI bus request.
PC/PCI DMA Acknowledges [A:B]: This grant serializes an ISA-like DACK# for
the purpose of running DMA/ISA master cycles over the PCI bus. This is used by
devices such as PCI-based Super/IO or audio codecs which need to perform
legacy 8237 DMA but have no ISA bus.
When not used for PC/PCI, these signals can be used as General Purpose
Outputs. GNTB# can also be used as the fifth PCI bus master grant output. These
signal have internal pull-up resistors.
Description
Intel
®
82801E C-ICH
39