STPCI0180BTI3 datasheet(25/55 Pages) STMICROELECTRONICS

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PIN DESCRIPTION

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Issue 1.1

3.2.6 IPC (Combined with Serial Interface)

DACK_ENC[2:0]

DMA Acknowledge. These are

the ISA bus DMA acknowledge signals. They are

encoded by the STPC Industrial before output and

should be decoded externally using ISACLK and

ISACLKX2 as the control strobes.

DREQ_MUX[1:0]

ISA Bus Multiplexed DMA Re-

quest. These are the ISA bus DMA request sig-

nals. They are to be encoded before connection to

the STPC Industrial using ISACLK and ISACLKX2

as the input selection strobes.

ISA Terminal Count. This is the terminal count

output of the DMA controller and is connected to

the TC line of the ISA bus. It is asserted during the

last DMA transfer, when the Byte count expires.

3.2.7 KEYBOARD/MOUSE INTERFACE

KBCLK,

Keyboard Clock line. Keyboard data is

latched by the controller on each negative clock

edge produced on this pin. The keyboard can be

disabled by pulling this pin low by software control.

KBDATA,

Keyboard Data Line. 11-bits of data are

shifted serially through this line when data is being

transferred. Data is synchronised to KBCLK.

MCLK,

Mouse Clock line. Mouse data is latched

by the controller on each negative clock edge pro-

duced on this pin. The mouse can be disabled by

pulling this pin low by software control.

MDATA,

Mouse Data Line. 11-bits of data are

shifted serially through this line when data is being

transferred. Data is synchronised to MCLK.

3.2.8 SERIAL INTERFACE

(Serial 1 combined with TFT Interface)

(Serial 2 combined with IPC)

SIN1, SIN2

Input Serial input. Data is clocked in

using RCLK/16.

SOUT1, SOUT2

Serial Output. Data is clocked out

using TCLK/16 (TCLK=BAUD#).

DCD1#, DCD2#

Input Data carrier detect.

RI1#, RI2#

Input Ring indicator.

DSR1#, DSR2#

Input Data set ready.

CTS1#, CTS2#

Input Clear to send.

RTS1#, RTS2#

Output Request to send.

DTR1#, DTR2#

Output Data terminal read.

3.2.9 PARALLEL PORT

(Combined with ISA Bus an IPC)

Paper End. Input status signal from printer.

SLCT

Printer Select. Printer selected input.

BUSY#

Printer Busy.

Input status signal from printer.

ERR#

Error. Input status signal from printer.

ACK#

Acknowledge.

Input status signal from printer.

PDDIR#

Parallel Device Direction.

Bidirectional control line output.

STROBE#

PCS/Strobe#.

Data transfer strobe line to printer.

INIT#

Initialize Printer. This output sends an initial-

ize command to the connected printer.

AUTPFDX#

Automatic Line feed. This output

sends a command to the connected printer to au-

tomatically generate line feed on received car-

riage returns.

SLCTIN#

Select In. Printer select output.

PPD[7-0]

Printer Data Lines Data transfer lines to

printer. Bidirectional depending on modes.

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