ST78C36CJ44-F Datasheet, PDF (1/27 Pages) Exar Corporation – ECP/EPP PARALLEL PRINTER PORT WITH 16-BYTE FIFO

ST78C36/36A
ECP/EPP PARALLEL PRINTER PORT WITH 16-BYTE FIFO
APRIL 2010
REV. 5.1.0
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.
FIGURE 1. ST78C36/36A BLOCK DIAGRAM
APPLICATIONS
• 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, ST78C36Q64)
• Software selectable Interrupt (5, 7, or 9) and 8-bit
DMA channel (ST78C36CQ64)
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 • [phone] • FAX [phone] • www.exar.com