參數(shù)資料
型號： ST16C552
廠商： Exar Corporation
英文描述： Dual UART with 16-Byte FIFO and Parallel Printer Port(雙通用異步接收器/發(fā)送器（帶16字節(jié)的先進(jìn)先出和并行打印機(jī)端口）)
中文描述： 雙UART），16字節(jié)FIFO和并行打印機(jī)端口（雙通用異步接收器/發(fā)送器（帶16字節(jié)的先進(jìn)先出和并行打印機(jī)端口）
文件頁數(shù)： 15/40頁
文件大?。?/td> 463K
代理商： ST16C552
15
ST16C552/552A
Rev. 3.30
have internal pull-up resistors and can be wire-ord.
Normally, -STROBE is used to strobe PD0-PD7 bus
data into a printer input buffer. -SLCTIN normally
selects the printer while AutoFDXT signals the printer
to auto-linefeed. Other signals provide similar printer
functions but are not bi-directional. The printer func-
tions for these signals are described in table 1, Symbol
Description.
The interface provides a mode steering signal called
BIDEN. BIDEN controls the bi-directional 8-bit data
bus (PD0-PD7) direction, input or output. When
BIDEN is a logic 1 a single control bit (D5) in the control
register sets the input or output mode. Setting BIDEN
to a logic 0 however sets an IBM interface compatible
mode. In this mode the bus direction (input/output) is
set by eight data bits in the IOSEL register. An AA
(Hex) pattern sets the input mode while a 55 (hex)
pattern sets the output mode. I/O direction is depicted
in Table 6 below.
Printer Port
The 552/552A contains a general purpose 8-bit paral-
lel interface port that is designed to directly interface
with a CENTRONICS Printer. A number of the control/
interrupt signals and the 8-bit data bus have been
designed as bi-directional data buses. This allows the
interface to function with other device parallel data
bus applications. Signal -ACK is used to generate an
-INTP interface interrupt that would normally be con-
nected to the user CPU. -INTP can be made to follow
the -ACK signal, normal mode (see Figure 7) or it can
be configured for the latch mode. In the latch mode the
interrupt is not cleared until printer status register (SR)
is read. Another signal (INIT) can be made to function
as an outgoing or incoming interrupt, or combined with
other interrupts to provide a common wire-or interrupt
output. Interface signals -STROBE, -AutoFDXT, and
-SLCTIN are bi-directional and can be used as combi-
nations of input and/or output functions. The signals
Table 6, PD0-PD7 I/O DIRECTION MODE SELECTION
PORT DIRECTION
BIDEN
CONTROL REGISTER (D5)
I/O SELECT REGISTER
Input mode
Output mode
Output mode
Input mode
0
0
1
1
X
(Note 4)
X
(Note 4)
0
1
AA Hex
55 Hex
X
(Note 4)
X
(Note 4)
Note: 4 = dont care
相關(guān)PDF資料
PDF描述
ST16C552A Dual UART with 16-Byte FIFO and Parallel Printer Port(雙通用異步接收器/發(fā)送器（帶16字節(jié)的先進(jìn)先出和并行打印機(jī)端口）)
ST16C554DCJ68 QUAD UART WITH 16-BYTE FIFOS
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ST16C554DIQ64 QUAD UART WITH 16-BYTE FIFOS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST16C552ACJ68 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:
ST16C552ACJ68-F 功能描述:UART 接口集成電路 DUAL UART W/16BYTE FIFO&PARALELPRNTPORT RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
ST16C552ACJ68TR-F 功能描述:UART 接口集成電路 DUAL UART W/16BYTE FIFO&PARALELPRNTPORT RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
ST16C552AIJ68 制造商:EXAR 制造商全稱:EXAR 功能描述:DUAL UART WITH 16-BYTE FIFO AND PARALLEL PRINTER PORT
ST16C552AIJ68-F 功能描述:UART 接口集成電路 DUAL UART W/16BYTE FIFO&PARALELPRNTPORT RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
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