W83877TF Datasheet, PDF (16/154 Pages) Winbond – I/O chip disk drive adapter

W83877TF
1.1 Host Interface, continued
SYMBOL PIN
DRQ_C
4
DACK_ C
18
I/O
OUT_12t
IN_ts
FUNCTION
DMA request signal C.
DMA Acknowledge signal C.
TC
IRQIN
IRQ_ A
GIO1
IRQ_ B
GIO0
IRQ_C
IRQ_D
IRQ_E
IRQ_F
IRQ_G
PCICLK
IRQ_H
SERIRQ
SCI
CLKIN
SMI
DACK_ A
97
IN_ts Terminal Count. When active, this pin indicates termination of a
DMA transfer.
93
IN_t Interrupt request input for IRQ routing ; For example , the IRQ12
can be routed into this port when PS/2 mouse is not installed.
96 OUT_12t Interrupt request signal A, when CR16 Bit 5 (G1IQSEL) = 0.
I/O_12t General Purpose I/O port 1, when CR16 Bit 5 (G1IQSEL) = 1.
92 OUT_12t Interrupt request signal B, when CR16 Bit 4 (G0IQSEL) = 0.
I/O_12t General Purpose I/O port 0, when CR16 Bit 4 (G0IQSEL) = 1.
44 OUT_12t Interrupt request signal C.
37 OUT_12t Interrupt request signal D.
23 OUT_12t Interrupt request signal E.
99 OUT_12t Interrupt request signal F.
1 OUT_12t Interrupt request signal G.
IN_t PCI clock input, when the serial IRQ function is selected.
91 OUT_12t Interrupt request signal H.
I/O_12t Serial interrupt input/output, when the Serial IRQ mode is
selected by setting IRQMODS bit in CR31 register.
3
OD_{12 For the ACPI power management, SCI is active low 200ns for}
the power management events, which generate an SCI interrupt
in the ACPI mode.
7
IN_t 24MHz/48MHZ clock input. CLKINSEL bit in CR2C register
should be correctly reset/set according to the input frequency.
8
OD_{12 For the legacy power management, the SMI is active low 200ns}
for the power management events, which generate an SMI
interrupt in the legacy power management mode.
This SMI output is enabled by setting the SMI_EN bit in CR3A
register.
41
IN_ts DMA acknowledge signal A.
DRQ_A
39 OUT_12t DMA request signal A.
Publication Release Date: March 1998
-6-
Version 0.61