|
ST78C36 Datasheet, PDF (1/26 Pages) Exar Corporation – ECP/EPP PARALLEL PRINTER PORT WITH 16-BYTE FIFO | |||
|
áç
ST78C36/36A
ECP/EPP PARALLEL PRINTER PORT WITH 16-BYTE FIFO
FEBRUARY 2004
GENERAL DESCRIPTION
The ST78C36/36A is a monolithic Parallel Port
Interface for use with IBM PC compatible platforms.
Operation as a standard Centronics printer port is the
default, but software may re-configure the device to
support bi-directional IBM PS/2 parallel port,
Enhanced Parallel Port (EPP), or the Extended
Capabilities Port (ECP, as defined by Hewlett Packard
and Microsoft) modes. The ECP modes are
supported by a 16 byte FIFO that may be accessed
by programmed I/O or DMA cycles.
APPLICATIONS
REV. 5.0.1
⢠Printers, Scanners and other peripherals
⢠ZIP Drives and back up drives
⢠Printer Server
⢠Embedded Applications
FEATURES
⢠IBM AT bus compatible
⢠Bi-directional port capability
⢠16 byte FIFO for ECP modes
⢠On-chip oscillator (ST78C36A, ST78C36CQ64)
⢠Software selectable Interrupt (5, 7, or 9) and 8-bit
DMA channel (ST78C36CQ64)
FIGURE 1. ST78C36/36A BLOCK DIAGRAM
D0-D7
-IOR
-IOW
RESET
A0-A2
A10
-CS
AEN
-IOR, -IOW
-IRQx
IOCHRDY
DRQx
PDIR
TC
-DACKx
Printer
FIFO
Registers
Printer
Data
Ports
Printer
Control
Logic
PD0-PD7
-STROBE
INIT
-AUTOFDX
-SELCTIN
PE, SELECT
BUSY, -ACK
-ERROR
Clock
&
Timing
Generator
XTAL2
XTAL1
Exar Corporation 48720 Kato Road, Fremont CA, 94538 ⢠(510) 668-7000 ⢠FAX (510) 668-7017 ⢠www.exar.com
|
▷ |