REV. 5.1.0 ECP/EPP PARALLEL PRINTER PORT WITH 16-BYTE FIFO 1.0 OVERVIEW This device is designed around the Hewlett Packard/Micros" />
參數(shù)資料
型號(hào)： ST78C36CJ44TR-F
廠商： Exar Corporation
文件頁(yè)數(shù)： 23/27頁(yè)
文件大小： 0K
描述： IC UART FIFO 16B 44PLCC
標(biāo)準(zhǔn)包裝： 500
特點(diǎn)： *
FIFO's： 16 字節(jié)
規(guī)程： 打印機(jī)
電源電壓： 5V
帶并行端口： 是
安裝類型： 表面貼裝
封裝/外殼： 44-LCC（J 形引線）
供應(yīng)商設(shè)備封裝： 44-PLCC（16.59x16.59）
包裝： 帶卷 (TR)
ST78C36/36A
5
REV. 5.1.0
ECP/EPP PARALLEL PRINTER PORT WITH 16-BYTE FIFO
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:
■ ECP defined interrupts are pulsed, LOW true (Centronics -ACK is non-pulsed, LOW true).
■ PWord size is forced to 1 byte.
■ There is 1 byte in the transmitter that does not affect the FIFO full bit (ECP modes).
■ RLE compression is not supported in hardware.
■ IRQ channel is selectable as 5, 7, or 9 (ST78C36CQ64 only).
■ DMA channel is selectable as 1, 2, or 3 (ST78C36CQ64 only).
■ FIFO THRESHOLD is set at 8 (used only for non-DMA access to the FIFO).
DATA
000
R/W
000, 001
Data Register
ECP-AFIFO
000
W
011
ECP FIFO (Address)
DSR
001
R
All
Status Register
DCR
002
R/W
All
Control Register
EPP-APort
003
R/W
100
EPP Port (Address)
EPP-DPort
004 - 007
R/W
100
EPP Port (Data)
C-FIFO
400
W
010
Parallel Port Data FIFO
ECP-DFIFO
400
R/W
011
ECP FIFO (Data)
T-FIFO
400
R/W
110
Test FIFO
Cnfg-A
400
R
111
Configuration Register A
Cnfg-B
401
R/W
111
Configuration Register B
ECR
402
R/W
All
Extended Control Register
VCC
44
16, 56
Pwr
Power Supply (+5V).
GND
23,30
15, 25,
37, 48,
64
Pwr
Supply Ground.
PORT
ADDRESS
R/W
MODE
FUNCTION
PIN DESCRIPTION
NAME
44-PLCC
PIN
#
64-LQFP
PIN
#
TYPE
DESCRIPTION
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