参数资料
型号: ST78C36CJ44TR-F
厂商: Exar Corporation
文件页数: 23/27页
文件大小: 0K
描述: IC UART FIFO 16B 44PLCC
标准包装: 500
特点: *
FIFO's: 16 字节
规程: 打印机
电源电压: 5V
带并行端口:
安装类型: 表面贴装
封装/外壳: 44-LCC(J 形引线)
供应商设备封装: 44-PLCC(16.59x16.59)
包装: 带卷 (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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