F71883 datasheet(39/133 Pages) FINTEK

39 / 133 page

May, 2008

V0.27P

-33-

F71883

TMOUT

This bit is valid only in EPP mode. Return 1 when in other modes.

It indicates that a 10uS time out has occurred on the EPP bus.

0: no time out error.

1: time out error occurred, write 1 to clear.

Device Control Register

 Base + 2

Bit

Name

R/W Default

Description

7-6 Reserved

Reserved. Return 11b when read.

DIR

R/W

0: the parallel port is in output mode.

1: the parallel port is in input mode.

It is auto reset to 0 when in SPP mode.

ACKIRQ_EN

R/W

Enable an interrupt at the rising edge of ACK#.

SLIN

R/W

Inverted and then drives the parallel port signal SLIN#.

When read, the status of inverted SLIN# is return.

INIT_N

R/W

Drives the parallel port signal INIT#.

When read, the status of INIT# is return.

AFD

R/W

Inverted and then drives the parallel port signal AFD#.

When read, the status of inverted AFD# is return.

STB

R/W

Inverted and then drives the parallel port signal STB#.

When read, the status of inverted STB# is return.

EPP Address Register

 Base + 3

Bit

Name

R/W Default

Description

7-0 EPP_ADDR

R/W

00h

Write this register will cause the hardware to auto transmit the written data to

the device with the EPP Address Write protocol.

Read this register will cause the hardware to auto receive data from the device

by with the EPP Address Read protocol.

EPP Data Register

 Base + 4 – Base + 7

Bit

Name

R/W Default

Description

7-0 EPP_DATA

R/W

00h

Write this register will cause the hardware to auto transmit the written data to

the device with the EPP Data Write protocol.

Read this register will cause the hardware to auto receive data from the device

by with the EPP Data Read protocol.

Parallel Port Data FIFO

 Base + 400h

Bit

Name

R/W Default

Description

7-0 C_FIFO

R/W

00h

Data written to this FIFO is auto transmitted by the hardware to the device by

using standard parallel port protocol.

It is only valid in ECP and the ECP_MODE is 010b.The operation is only for

forward direction.

F71883 Datasheet(PDF) 39 Page - Feature Integration Technology Inc.

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