AX88196 datasheet(22/42 Pages) ASIX

22 / 42 page

AX88196

Local CPU BUS MAC Controller

ASIX ELECTRONICS CORPORATION

4.14 SPP Data Port Register (SPP_DPR) Offset 18H (Read/Write)

FIELD

NAME

DESCRIPTION

7:0

Printer Data Port

4.15 SPP Status Port Register (SPP_SPR) Offset 19H (Read)

FIELD

NAME

DESCRIPTION

/BUSY

Reading a ‘0’ indicates that the printer is not ready to receive new data.

/ACK

Reading a ‘0’ indicates that the printer has received the data and is ready to accept new data.

Reading a ‘1’ indicates that the printer is out of paper.

SLCT

Reading a ‘1’ indicates that the printer has power on.

/ERR

Reading a ‘0’ indicates that there is an error condition at the printer.

2:0

Reserved

4.16 SPP Command Port Register (SPP_CPR) Offset 1AH (Read/Write)

FIELD

NAME

DESCRIPTION

7:6

Reserved

/DOE

Seting to ‘0’ enable print data output to printer. Default sets to ‘1’.

IRQEN IRQ enable : printer port interrupt is not supportted.

SLCTIN Seting to ‘1’ selects the printer.

/INIT

Seting to ‘0’ initiates the printer

ATFD

Seting to ‘1’ causes the printer to automatically feed one line after each line is printed.

STRB

Seting a low-high-low pulse on this register is used to strobe the print data into the printer.

AX88196 Datenblatt(PDF) 22 Page - ASIX Electronics Corporation