參數(shù)資料
型號: XR20M1172IL32-F
廠商: Exar Corporation
文件頁數(shù): 17/55頁
文件大?。?/td> 0K
描述: IC UART FIFO I2C/SPI 64B 32QFN
標準包裝: 490
特點: *
通道數(shù): 2,DUART
FIFO's: 64 字節(jié)
規(guī)程: RS485
電源電壓: 1.62 V ~ 3.63 V
帶自動流量控制功能:
帶IrDA 編碼器/解碼器:
帶故障啟動位檢測功能:
帶調(diào)制解調(diào)器控制功能:
帶CMOS:
安裝類型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤
供應商設備封裝: 32-QFN 裸露焊盤(5x5)
包裝: 托盤
其它名稱: 1016-1477
XR20M1172IL32-F-ND
XR20M1172
24
TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO
REV. 1.2.0
2.17
Internal Loopback
The M1172 UART provides an internal loopback capability for system diagnostic purposes. The internal
loopback mode is enabled by setting MCR register bit-4 to logic 1. All regular UART functions operate normally.
Figure 19 shows how the modem port signals are re-configured. Transmit data from the transmit shift register
output is internally routed to the receive shift register input allowing the system to receive the same data that it
was sending. The TX, RTS# and DTR# pins are held while the CTS#, DSR# CD# and RI# inputs are ignored.
Caution: the RX input pin must be held HIGH during loopback test else upon exiting the loopback test the
UART may detect and report a false “break” signal. Also, Auto RTS/CTS flow control is not supported during
internal loopback.
FIGURE 19. INTERNAL LOOP BACK
TX
R X
M
o
d
e
m
/
G
e
n
e
ra
l
P
u
rp
o
s
e
C
o
n
tr
o
l
L
o
g
ic
In
te
rn
a
l
D
a
ta
B
u
s
L
in
e
s
a
n
d
C
o
n
tr
o
l
S
ig
n
a
ls
R TS #
MC R bit-4=1
V CC
VC C
Transm it Shift Register
(THR /FIFO )
Receive Shift Register
(RHR/FIFO )
C TS #
D TR#
D SR#
R I#
C D#
O P 1#
RTS#
CTS#
DTR#
DSR #
RI#
CD#
VCC
O P 2#
相關(guān)PDF資料
PDF描述
XR88C192CV-F IC UART FIFO DUAL 44LQFP
XR16L2550IM-F IC UART FIFO 16B DUAL 48TQFP
XR21V1412IL32-F IC UART FIFO USB DUAL 32QFN
ST16C650ACQ48-F IC UART FIFO 32B 48TQFP
XR68M752IM48-F IC UART FIFO 64B DUAL 48TQFP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR20M1172IL32-F 制造商:Exar Corporation 功能描述:IC DUAL UART 16MBPS 3.63V 32-QFN
XR20M1172L32-0A-EB 功能描述:UART 接口集成電路 Supports M1172 32pin QFN, I2C Interface 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
XR20M1172L32-0B-EB 功能描述:UART 接口集成電路 Supports M1172 32pin QFN, SPI Interface 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
XR20M1280 制造商:EXAR 制造商全稱:EXAR 功能描述:I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
XR20M1280IL24-F 功能描述:UART 接口集成電路 1Ch 12C/SPI UART w/ Lvl Shftrs & 4 GPIOs 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