FDC37B78X View Datasheet(PDF) - SMSC -> Microchip

Part Name

Description

Manufacturer

FDC37B78X

Enhanced Super I/O Controller with ACPI Support, Real Time Clock and Consumer IR

SMSC -> Microchip 

Parallel Port, Logical Device 3

TABLE 77 - PARALLEL PORT, LOGICAL DEVICE 3 [LOGICAL DEVICE NUMBER = 0X03]

NAME REG INDEX

DEFINITION

STATE

PP Mode 0xF0 R/W Bits[2:0] Parallel Port Mode

C

Register

= 100 Printer Mode (default)

= 000 Standard and Bi-directional (SPP) Mode

Default =

= 001 EPP-1.9 and SPP Mode

0x3C

= 101 EPP-1.7 and SPP Mode

on Vcc POR

= 010 ECP Mode

or

= 011 ECP and EPP-1.9 Mode

Reset_Drv

= 111 ECP and EPP-1.7 Mode

Bit[6:3] ECP FIFO Threshold

0111b (default)

Bit[7] PP Interupt Type

Not valid when the parallel port is in the Printer

Mode (100) or the Standard & Bi-directional Mode

(000).

= 1 Pulsed Low, released to high-Z.

= 0 IRQ follows nACK when parallel port in EPP

Mode or [Printer,SPP, EPP] under ECP.

PP Mode 0xF1 R/W

Register 2

Default =

0x00

on Vcc POR

or

Reset_Drv

IRQ level type when the parallel port is in ECP,

TEST, or Centronics FIFO Mode.

Bits[1:0] PPFDC - muxed PP/FDC control

= 00 Normal Parallel Port Mode

= 01 PPFD1:Drive 0 is on the FDC pins

Drive 1 is on the Parallel port pins

Drive 2 is on the FDC pins

Drive 3 is on the FDC pins

= 10 PPFD2:Drive 0 is on the Parallel port pins

Drive 1 is on the Parallel port pins

Drive 2 is on the FDC pins

Drive 3 is on the FDC pins

Bits[7:2] Reserved. Set to zero.

189

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