參數(shù)資料
型號(hào)： ST78C34
廠商： Exar Corporation
英文描述： GENERAL PURPOSE PARALLEL PRINTER PORT WITH 83 BYTE FIFO
中文描述： 通用并行打印機(jī)端口83字節(jié)FIFO
文件頁(yè)數(shù)： 4/21頁(yè)
文件大?。?/td> 198K
代理商： ST78C34
6-6
ST78C34
Rev. 3.00
SYMBOL DESCRIPTION
Symbol
Pin
Signal
type
Pin Description
40
44
-ERROR
1
1
I
General purpose input or line printer error (active low, with internal
pull-up). This is an output from the printer to indicate an error by
holding it low during error condition.
SLCT
2
2
I
General purpose input or line printer selected (active high, with
internal pull-up). This is an output from the printer to indicate that
the line printer has been selected.
BUSY
3
3
I
General purpose input or line printer busy (active high, with internal
pull-up). An output from the printer to indicate printer is not ready
to accept data.
-ACK
4
4
I
General purpose input or line printer acknowledge (active low, with
internal pull-up). An output from the printer to indicate that data has
been accepted successfully.
PE
5
5
I
General purpose input or line printer paper empty (active high, with
internal pull-up). An output from the printer to indicate out of paper.
INTSEL
6
8
I
Interrupt select mode. The external -ACK can be selected as an
interrupt source by connecting this pin to the VCC or left open.
Connecting this pin to GND will set the interrupt to latched mode,
reading the status register resets the INT output.
D0-D7
14-7
16-9
I/O
Bi-directional data bus. Eight bit, three state data bus to transfer
information to or from the CPU. D0 is the least significant bit of
the data bus.
INT
16
19
O
Interrupt output (selectable active low or high). To signal the state
of the printer port. This pin tracks the -ACK input pin, When -ACK
is low INT is low and when -ACK is high INT is high if selected as
active low interrupt.
XTAL1
17
20
I
Crystal input 1 or external clock input. A crystal can be connected
to this pin and XTAL2 pin to utilize the internal oscillator circuit. An
external clock can be used to clock oscillator circuit.
XTAL2
18
21
O
Crystal input 2 or buffered clock output. See XTAL1.
-CS
19
22
I
Chip select (active low). A low at this pin enables the ST78C34 /
CPU data transfer operation.
相關(guān)PDF資料
PDF描述
ST78C34CJ44 GENERAL PURPOSE PARALLEL PRINTER PORT WITH 83 BYTE FIFO
ST78C34CP40 GENERAL PURPOSE PARALLEL PRINTER PORT WITH 83 BYTE FIFO
ST78C34IJ44 GENERAL PURPOSE PARALLEL PRINTER PORT WITH 83 BYTE FIFO
ST78C34IP40 GENERAL PURPOSE PARALLEL PRINTER PORT WITH 83 BYTE FIFO
ST78C36 ECP/EPP Parallel Printer Port with 16 Byte FIFO(ECP/EPP并行打印機(jī)端口（帶16字節(jié)先進(jìn)先出）)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST78C34CJ-0A-EVB 功能描述:界面開(kāi)發(fā)工具 Supports 78C34 44 ld PLCC, ISA Interface RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類(lèi)型:RS-485 工具用于評(píng)估:ADM3485E 接口類(lèi)型:RS-485 工作電源電壓:3.3 V
ST78C34CJ44 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:GENERAL PURPOSE PARALLEL PRINTER PORT WITH 83 BYTE FIFO
ST78C34CJ44-F 功能描述:輸入/輸出控制器接口集成電路 INTERNAL FIFO UART RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray
ST78C34CJ44TR-F 制造商:Exar Corporation 功能描述:ST78C34CJ44TR-F
ST78C34CP40 功能描述:輸入/輸出控制器接口集成電路 Gen Purpose Parallel Printer Port RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray
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