REV. 1.1.0 2.17 Internal Loopback The M1170 UART provides an internal loopback capabi" />
參數(shù)資料
型號: XR20M1170L24-0B-EB
廠商: Exar Corporation
文件頁數(shù): 15/56頁
文件大?。?/td> 0K
描述: EVAL BOARD FOR XR20M1170 24QFN
標(biāo)準(zhǔn)包裝: 1
主要目的: 接口,UART
嵌入式:
已用 IC / 零件: XR20M1170
次要屬性: I²C & SPI 接口
已供物品:
其它名稱: 1016-1621
XR20M1170L24-0B-EB-ND
XR20M1170
22
I2C/SPI UART WITH 64-BYTE FIFO
REV. 1.1.0
2.17
Internal Loopback
The M1170 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
RX
Mo
dem
/
G
en
era
lP
urp
ose
C
on
trol
L
ogic
In
te
rna
lDa
ta
Bu
s
Lin
es
a
nd
Control
S
ig
n
a
ls
RTS#
MCR bit-4=1
VC C
VCC
Transm it Shift R egister
(TH R/FIFO )
Receive Shift R egister
(RHR /FIFO )
CTS#
DTR #
DSR#
RI#
CD #
OP1#
RTS#
CTS#
DTR#
DSR#
RI#
CD#
VC C
OP2#
相關(guān)PDF資料
PDF描述
RPP30-4824S CONV DC/DC 30W 36-75VIN 24VOUT
RPP30-2424S-F CONV DC/DC 30W 18-36VIN 24VOUT
MLF2012A4R7J INDUCTOR MULTILAYER 4.7UH 0805
XR20M1170L16-0A-EB EVAL BOARD FOR XR20M1170 16QFN
GBM12DSAI CONN EDGECARD 24POS R/A .156 SLD
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR20M1170L28-0A-EB 功能描述:UART 接口集成電路 Supports M1170 28pin 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
XR20M1170L28-0B-EB 功能描述:界面開發(fā)工具 Supports M1170 28pin QFN, SPI Interface RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V
XR20M1172 制造商:EXAR 制造商全稱:EXAR 功能描述:TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO
XR20M1172_09 制造商:EXAR 制造商全稱:EXAR 功能描述:TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO
XR20M1172G28-0A-EB 功能描述:UART 接口集成電路 Supports M1172 28 ld TSSOP, 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