FDC37C672 查看數據表（PDF） - SMSC -> Microchip

零件编号

产品描述 (功能)

生产厂家

FDC37C672

Enhanced Super I/O Controller with Fast IR

SMSC -> Microchip 

Enhanced Super I/O Controller with Fast IR

Datasheet

Note 19.6 This chip uses ISA address bits [A11:A0] to decode the base address of each of its logical devices.

Table 19.5 - Interrupt Select Configuration Register Description

NAME

Interrupt Request

Level

Select 0

Default = 0x00

on Vcc POR or

Reset_Drv

REG INDEX

0x70 (R/W)

DEFINITION

Bits[3:0] selects which interrupt level is used for Interrupt 0.

0x00= no interrupt selected.

0x01= IRQ1

0x02= IRQ2/nSMI

0x03= IRQ3

0x04= IRQ4

0x05= IRQ6

0x06= IRQ7

0x07= IRQ7

0x08= IRQ8

0x09= IRQ9

0x0A= IRQ10

0x0B= IRQ11

0x0C= IRQ12

0x0D= IRQ13

0x0E= IRQ14

0x0F= IRQ15

STATE

C

Notes:

All interrupts are edge high (except ECP/EPP)

nSMI is active low

Notes:

An Interrupt is activated by setting the Interrupt Request Level Select 0 register to a non-zero value AND:

for the FDC logical device by setting DMAEN, bit D3 of the Digital Output Register.

for the PP logical device by setting IRQE, bit D4 of the Control Port and in addition

for the PP logical device in ECP mode by clearing serviceIntr, bit D2 of the ecr.

for the Serial Port logical device by setting any combination of bits D0-D3 in the IER

and by setting the OUT2 bit in the UART's Modem Control (MCR) Register.

for the RTC by (refer to the RTC section of this spec.)

for the KYBD by (refer to the KYBD controller section of this spec.)

IRQ pins must tri-state if not used/selected by any Logical Device. Refer to Section 19.2.7 - Note A. Logical

Device IRQ and DMA Operation.

nSMI must be disabled to use IRQ2.

All IRQ’s are available in Serial IRQ mode. Only IRQ[3:7] and IRQ[10:12] are available in Parallel IRQ mode.

NAME

DMA Channel

Select

Default = 0x04

on Vcc POR or

Reset_Drv

Table 19.6 - DMA Channel Select Configuration Register Description

REG INDEX

0x74 (R/W)

DEFINITION

Bits[2:0] select the DMA Channel.

0x00= Reserved

0x01= DMA1

0x02= DMA2

0x03= DMA3

0x04-0x07= No DMA active

STATE

C

SMSC FDC37C672

Page 131

DATASHEET

Rev. 10-29-03

Share Link: