REV. 1.2.1 2.25V TO 5.5V DUART WITH 64-BYTE FIFO 19 2.21 Internal Loopback The 2750 UART provides an internal loopback capability " />
參數(shù)資料
型號(hào): XR16L2750CMTR-F
廠商: Exar Corporation
文件頁(yè)數(shù): 11/48頁(yè)
文件大?。?/td> 0K
描述: IC UART FIFO 64B DUAL 48TQFP
標(biāo)準(zhǔn)包裝: 1,500
特點(diǎn): *
通道數(shù): 2,DUART
FIFO's: 64 字節(jié)
規(guī)程: RS232,RS485
電源電壓: 2.25 V ~ 5.5 V
帶自動(dòng)流量控制功能:
帶IrDA 編碼器/解碼器:
帶故障啟動(dòng)位檢測(cè)功能:
帶調(diào)制解調(diào)器控制功能:
帶CMOS:
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)
xr
XR16L2750
REV. 1.2.1
2.25V TO 5.5V DUART WITH 64-BYTE FIFO
19
2.21
Internal Loopback
The 2750 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 13 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 13. INTERNAL LOOP BACK IN CHANNEL A AND B
TXA/TXB
RXA/RXB
Modem
/
G
e
n
e
ral
Purpos
e
Cont
rol
Logic
Inte
rn
a
lD
a
ta
Bus
L
ines
and
Co
ntrol
Signa
ls
RTSA#/RTSB#
MCR bit-4=1
VCC
Transmit Shift Register
(THR/FIFO)
Receive Shift Register
(RHR/FIFO)
CTSA#/CTSB#
DTRA#/DTRB#
DSRA#/DSRB#
RIA#/RIB#
CDA#/CDB#
OP1#
OP2#
RTS#
CTS#
DTR#
DSR#
RI#
CD#
VCC
OP2A#/OP2B#
相關(guān)PDF資料
PDF描述
XR16V2550ILTR-F IC UART FIFO 16B DUAL 32QFN
ATMEGA324PA-MUR MCU AVR 32KB FLASH 20 MHZ 44QFN
ST78C36CJ44TR-F IC UART FIFO 16B 44PLCC
XR16L2550IMTR-F IC UART FIFO 16B DUAL 48TQFP
XR16M780IL32-F IC UART FIFO 64B 32QFN
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR16L2750IJ 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:2.25V TO 5.5V DUART WITH 64-BYTE FIFO
XR16L2750IJ-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
XR16L2750IM 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:2.25V TO 5.5V DUART WITH 64-BYTE FIFO
XR16L2750IM-F 功能描述:UART 接口集成電路 2.25V-5.5V 64B 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
XR16L2750IMTR-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