參數(shù)資料
型號： XR16C872
廠商： Exar Corporation
英文描述： Dual UART with 1284 Parallel Port and Plug-and-Play（PnP） Controller(雙通用異步接收器/發(fā)送器（帶1284雙向并行端口和即插即用控制器）)
中文描述： 雙UART）與1284并行端口，插頭插即用（PnP）功能控制器（雙通用異步接收器/發(fā)送器（帶1284雙向并行端口和即插即用控制器）
文件頁數(shù)： 8/60頁
文件大?。?/td> 314K
代理商： XR16C872
XR16C872
8
Rev. P1.00
Preliminary
Symbol
Pin #
Type
Pin Description
DTRA#,
DTRB#
65
55
O
Data Terminal Ready A/B or general purpose output. DTRA/B# are active
low and associated with UARTchannel A and B. A logic 0 on indicates that
UART A/B is ready. This pin is controlled via the MCR register for channel A/B.
Setting MCR bit-0 to logic 1 puts the output pin to logic 0. This pin will be a logic 1
after writing a logic 0 to MCR bit-0. This pin has no effect on the UART
transmitter or receiver.
RTSA#,
RTSB#
66
56
O
Request to Send A/B or general purpose output. RTSA/B# are active low
outputs and associated with UART channels A/B. Writing a logic 1 to MCR
bit-1sets the pin to a logic 0 and requests remote unit to send data. After a
reset this pin is set to a logic 1. When auto RTS flow control is enabled (EFR
bit-6=1), a logic 0 asks remote modem to send data and a logic 1 requests
to suspend. The user must assert RTS# after enabling auto RTS flow control.
CTSA#,
CTSB#
67,
57
I
Clear to Send A/B or general purpose input. CTSA/B# are active low
inputs and associated with UART channels A and B. A logic 0 indicates
the remote modem is ready for data. A level change on this input pin will
generate a status change interrupt (MSR bit-0). When auto CTS flow
control is enabled, a logic 1 suspends local data transmission and a logic 0
restarts the local transmitter.
DSRA#,
DSRB#
68,
58
I
Data Set Read A/B or general purpose input. DSRA/B# are active low inputs
and associated with UARTchannel A and B. A logic 0 on indicates the modem
is ready for data exchange with the UART. A logic level change on this input
pin will generate a status change interrupt (MSR bit-1).This pin has no effect
on the UART’s transmit or receive operation.
CDA#,
CDB#
69,
59
I
Carrier Detect A/B or general purpose input. CDA/B# are active low inputs and
associated with UART channels A and B. A logic 0 on this pin indicates a
carrier signal has been detected by the modem. A logic level change on this
input pin will generate a status change interrupt (MSR bit-3). This pin has no
effect on the UART’s transmit or receive operation.
RIA#,
RIB#
70,
60
I
Ring Indicator A/B or general purpose input. RIA/B# are active low inputs
and associated with UART channels A and B. A logic 0 on indicates the
modem has received a ringing signal from the telephone line. A logic 1
transition on this input pin will generate a status change interrupt (MSR
bit-2). This pin has no effect on UART's transmit or receive operation.
VCC
25,35,42
62,90
PWR
+5 Volts power supply.
GND
16,26,36,43
61,77,98
PWR
Signal ground.
PIN DESCRIPTION (CONT'D)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR16C872CQ 制造商:EXAR 制造商全稱:EXAR 功能描述:DUAL UART WITH 1284 PARALLEL PORT AND PLUG-AND-PLAY CONTROLLER
XR16C872IQ 制造商:EXAR 制造商全稱:EXAR 功能描述:DUAL UART WITH 1284 PARALLEL PORT AND PLUG-AND-PLAY CONTROLLER
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XR16L2450_05 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V DUART
XR16L2450IJ 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V DUART
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