REV. 1.1.3 TXRDYB# - 12 6 O UART channel B Transmitter Ready (active low). The output pro- vide" />
參數(shù)資料
型號(hào)： XR16L2550IMTR-F
廠商： Exar Corporation
文件頁(yè)數(shù)： 34/44頁(yè)
文件大?。?/td> 0K
描述： IC UART FIFO 16B DUAL 48TQFP
標(biāo)準(zhǔn)包裝： 1,500
特點(diǎn)： *
通道數(shù)： 2，DUART
FIFO's： 16 字節(jié)
規(guī)程： RS232
電源電壓： 2.25 V ~ 5.5 V
帶自動(dòng)流量控制功能： 是
帶IrDA 編碼器/解碼器： 是
帶故障啟動(dòng)位檢測(cè)功能： 是
帶調(diào)制解調(diào)器控制功能： 是
帶CMOS： 是
安裝類(lèi)型： 表面貼裝
封裝/外殼： 48-TQFP
供應(yīng)商設(shè)備封裝： 48-TQFP（7x7）
包裝： 帶卷 (TR)
XR16L2550
4
LOW VOLTAGE DUART WITH 16-BYTE FIFO
REV. 1.1.3
TXRDYB#
-
12
6
O
UART channel B Transmitter Ready (active low). The output pro-
vides the TX FIFO/THR status for transmit channel B. If it is not
used, leave it unconnected.
RXRDYB#
-
23
18
O
UART channel B Receiver Ready (active low). This output pro-
vides the RX FIFO/RHR status for receive channel B. If it is not
used, leave it unconnected.
MODEM OR SERIAL I/O INTERFACE
TXA
5
13
7
O
UART channel A Transmit Data. If it is not used, leave it uncon-
nected.
RXA
4
11
5
I
UART channel A Receive Data. Normal receive data input must
idle at logic 1 condition. If it is not used, tie it to VCC or pull it high
via a 100k ohm resistor.
RTSA#
23
36
33
O
UART channel A Request-to-Send (active low) or general pur-
pose output. This output must be asserted prior to using auto
RTS flow control, see EFR[6], MCR[1] and IER[6]. If it is not
used, leave it unconnected.
CTSA#
25
40
38
I
UART channel A Clear-to-Send (active low) or general purpose
input. It can be used for auto CTS flow control, see EFR[7] and
IER[7]. This input should be connected to VCC when not used.
DTRA#
-
37
34
O
UART channel A Data-Terminal-Ready (active low) or general
purpose output. If it is not used, leave it unconnected.
DSRA#
-
41
39
I
UART channel A Data-Set-Ready (active low) or general purpose
input. This input should be connected to VCC when not used.
This input has no effect on the UART.
CDA#
-
42
40
I
UART channel A Carrier-Detect (active low) or general purpose
input. This input should be connected to VCC when not used.
This input has no effect on the UART.
RIA#
-
43
41
I
UART channel A Ring-Indicator (active low) or general purpose
input. This input should be connected to VCC when not used.
This input has no effect on the UART.
OP2A#
-
35
32
O
Output Port 2 Channel A - The output state is defined by the user
and through the software setting of MCR[3]. INTA is set to the
active mode and OP2A# output to a logic 0 when MCR[3] is set to
a logic 1. INTA is set to the three state mode and OP2A# to a
logic 1 when MCR[3] is set to a logic 0. This output should not be
used as a general output else it will disturb the INTA output func-
tionality. If it is not used at all, leave it unconnected.
TXB
6
14
8
O
UART channel B Transmit Data. If it is not used, leave it uncon-
nected.
RXB
3
10
4
I
UART channel B Receive Data. Normal receive data input must
idle at logic 1 condition. If it is not used, tie it to VCC or pull it high
via a 100k ohm resistor.
Pin Description
NAME
32-QFN
PIN #
44-PLCC
PIN #
48-TQFP
PIN #
TYPE
DESCRIPTION
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