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參數(shù)資料
型號(hào)： XR16L2552IJ-F
廠商： Exar Corporation
文件頁數(shù)： 23/45頁
文件大?。?/td> 0K
描述： IC UART FIFO 16B DUAL 44PLCC
標(biāo)準(zhǔn)包裝： 27
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)位檢測功能： 是
帶調(diào)制解調(diào)器控制功能： 是
帶CMOS： 是
安裝類型： 表面貼裝
封裝/外殼： 44-LCC（J 形引線）
供應(yīng)商設(shè)備封裝： 44-PLCC（16.59x16.59）
包裝： 管件
XR16L2552
3
REV. 1.1.2
2.25V TO 5.5V DUART WITH 16-BYTE FIFO
PIN DESCRIPTIONS
Pin Description
NAME
48-TQFP
PIN#
44-PLCC
PIN #
TYPE
DESCRIPTION
DATA BUS INTERFACE
A2
A1
A0
10
9
4
15
14
10
I
Address data lines [2:0]. These 3 address lines select one of the internal reg-
isters in UART channel A/B during a data bus transaction.
D7
D6
D5
D4
D3
D2
D1
D0
3
2
1
48
47
46
45
44
9
8
7
6
5
4
3
2
I/O
Data bus lines [7:0] (bidirectional).
IOR#
20
24
I
Input/Output Read Strobe (active low). The falling edge instigates an internal
read cycle and retrieves the data byte from an internal register pointed to by
the address lines [A2:A0]. The data byte is placed on the data bus to allow the
host processor to read it on the rising edge.
IOW#
15
20
I
Input/Output Write Strobe (active low). The falling edge instigates an internal
write cycle and the rising edge transfers the data byte on the data bus to an
internal register pointed by the address lines.
CS#
13
18
I
UART chip select (active low). This function selects channel A or B in accor-
dance with the logical state of the CHSEL pin. This allows data to be trans-
ferred between the user CPU and the L2552.
CHSEL
11
16
I
Channel Select - UART channel A or B is selected by the logical state of this
pin when the CS# pin is a logic 0. A logic 0 on the CHSEL selects the UART
channel B while a logic 1 selects UART channel A. Normally, CHSEL could
just be an address line from the user CPU such as A3. Bit-0 of the Alternate
Function Register (AFR) can temporarily override CHSEL function, allowing
the user to write to both channel register simultaneously with one write cycle
when CS# is low. It is especially useful during the initialization routine.
INTA
30
34
O
UART channel A Interrupt output (active high). A logic high indicates channel
A is requesting for service.
INTB
12
17
O
UART channel B Interrupt output (active high). A logic high indicates channel
B is requesting for service.
TXRDYA#
43
1
O
UART channel A Transmitter Ready (active low). The output provides the TX
FIFO/THR status for transmit channel A. If it is not used, leave it uncon-
nected.
RXRDYA#
31
-
O
UART channel A Receiver Ready (active low). This output provides the RX
FIFO/RHR status for receive channel A. This pin is only available on the 48-
pin TQFP package. If it is not used, leave it unconnected.
TXRDYB#
28
32
O
UART channel B Transmitter Ready (active low). The output provides the TX
FIFO/THR status for transmit channel B. If it is not used, leave it uncon-
nected.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR16L2552IJTR 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:
XR16L2552IJTR-F 功能描述:UART 接口集成電路 UART 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
XR16L2552IM 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:
XR16L2552IM-F 功能描述:UART 接口集成電路 UART 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
XR16L2552IMTR-F 制造商:Exar Corporation 功能描述:UART 2-CH 16Byte FIFO 2.5V/3.3V/5V 48-Pin TQFP T/R 制造商:Exar Corporation 功能描述:XR16L2552IMTR-F
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