REV. 1.0.3 2.11 Internal Loopback The V554 UART provides an internal l" />
參數(shù)資料
型號(hào): XR16V554DIV-0A-EB
廠商: Exar Corporation
文件頁數(shù): 10/43頁
文件大?。?/td> 0K
描述: EVAL BOARD FOR XR16V554D 64LQFP
標(biāo)準(zhǔn)包裝: 1
系列: *
XR16V554/554D
18
2.25V TO 3.6V QUAD UART WITH 16-BYTE FIFO
REV. 1.0.3
2.11
Internal Loopback
The V554 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 11 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 pin is held HIGH or mark condition while RTS# and DTR# are de-asserted, and CTS#,
DSR# CD# and RI# inputs are ignored. Caution: the RX input must be held HIGH during loopback test else
upon exiting the loopback test the UART may detect and report a false “break” signal.
FIGURE 11. INTERNAL LOOPBACK
TX A-D
RX A-D
M
ode
m
/
G
e
neral
Purp
ose
Co
ntro
lLogic
In
te
rn
al
Dat
aBu
sLi
nes
an
d
Co
ntro
lSi
gn
als
RTS# A-D
MCR bit-4=1
VCC
Transmit Shift Register
(THR/FIFO)
Receive Shift Register
(RHR/FIFO)
CTS# A-D
DTR# A-D
DSR# A-D
RI# A-D
CD# A-D
OP1#
OP2#
RTS#
CTS#
DTR#
DSR#
RI#
CD#
VCC
相關(guān)PDF資料
PDF描述
RBC15DCAI-S189 CONN EDGECARD 30POS R/A .100 SLD
1-6374039-0 C/A 62.5/125, PLNM ZIP, SC 10
LK1608R82M-T INDUCTOR MULTILAYER .82UH 0603
VI-J7Y-EZ-S CONVERTER MOD DC/DC 3.3V 16.5W
CBC2016T330M INDUCTOR POWER 33UH 0806
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR16V554DIV-F 功能描述:UART 接口集成電路 2.25V-3.6V 16B FIFO temp -45 to 85C;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
XR16V554DIVTR-F 功能描述:UART 接口集成電路 XR16V554DIVTR-F 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
XR16V554IJ 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:
XR16V554IJ-0A-EVB 功能描述:界面開發(fā)工具 Supports V554 68ld PLCC,ISA Interface RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V
XR16V554IJ-F 功能描述:UART 接口集成電路 2.25V-3.6V 16B FIFO temp -45 to 85C;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