ST78C36A

www.DataSheet4U.com áç FEBRUARY 2004 ST78C36/36A ECP/EPP PARALLEL PRINTER PORT WITH 16-BYTE FIFO REV. 5.0.1 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 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 Data bus & Control Logic Printer FIFO Registers DataSheet4U.com Printer Data Ports PD0-PD7 DataShee Inter Connect Bus Lines & Control signals A0-A2 A10 -CS AEN -IOR, -IOW -IRQx IOCHRDY DRQx PDIR TC -DACKx Register Select Logic Printer Control Logic -STROBE INIT -AUTOFDX -SELCTIN PE, SELECT BUSY, -ACK -ERROR Clock & Timing Generator Interrupt Control Logic XTAL2 XTAL1 DataSheet4U.com Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510)...