ST78C36(2004) 查看數據表（PDF） - Exar Corporation
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ST78C36 Datasheet PDF : 26 Pages
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REV. 5.0.1
PIN DESCRIPTION
ST78C36/36A
ECP/EPP PARALLEL PRINTER PORT WITH 16-BYTE FIFO
NAME
VCC
GND
44-PLCC 64-TQFP
TYPE
PIN #
PIN#
44
16, 56 Pwr Power Supply (+5V).
23,30
15, 25,
37, 48,
64
Pwr Supply Ground.
DESCRIPTION
1.0 OVERVIEW
This device is designed around the Hewlett Packard/Microsoft specification for Extended Capabilities Port
Protocol with “ECR mode 100” defined as Enhanced Parallel Port (EPP) mode. The internal timing engines
were designed around a 24 MHz reference, which can be supplied from an external source or by the built-in
oscillator circuit (ST78C36ACJ and ST78C36CQ64 only) with an appropriate crystal.
At system RESET, the device defaults to standard IBM PC compatible Centronics printer mode (output only).
The bi-directional PS/2, EPP, and ECP modes can only be activated by programming the ECR mode field (this
requires address bit A10 = 1, which is outside the normal ISA I/O space).
Optional capabilities of the ECP specification are set as follows:
s ECP defined interrupts are pulsed, LOW true (Centronics -ACK is non-pulsed, LOW true).
s PWord size is forced to 1 byte.
s There is 1 byte in the transmitter that does not affect the FIFO full bit (ECP modes).
s RLE compression is not supported in hardware.
s IRQ channel is selectable as 5, 7, or 9 (ST78C36CQ64 only).
s DMA channel is selectable as 1, 2, or 3 (ST78C36CQ64 only).
s FIFO THRESHOLD is set at 8 (used only for non-DMA access to the FIFO).
PORT
DATA
ECP-AFIFO
DSR
DCR
EPP-APort
EPP-DPort
C-FIFO
ECP-DFIFO
T-FIFO
Cnfg-A
Cnfg-B
ECR
ADDRESS
000
000
001
002
003
004 - 007
400
400
400
400
401
402
R/W
MODE
FUNCTION
R/W
000, 001
Data Register
W
011
ECP FIFO (Address)
R
All
Status Register
R/W
All
Control Register
R/W
100
EPP Port (Address)
R/W
100
EPP Port (Data)
W
010
Parallel Port Data FIFO
R/W
011
ECP FIFO (Data)
R/W
110
Test FIFO
R
111
Configuration Register A
R/W
111
Configuration Register B
R/W
All
Extended Control Register
5
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