REV. 2.3.1 24 2.22 Internal Loopback The 850 UART provides an internal loopback" />
參數(shù)資料
型號: XR16C850IM-F
廠商: Exar Corporation
文件頁數(shù): 17/56頁
文件大?。?/td> 0K
描述: IC UART FIFO 128B 48TQFP
標(biāo)準(zhǔn)包裝: 250
特點: *
通道數(shù): 1,UART
FIFO's: 128 字節(jié)
規(guī)程: RS485
電源電壓: 2.97 V ~ 5.5 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: 48-TQFP
供應(yīng)商設(shè)備封裝: 48-TQFP(7x7)
包裝: 托盤
其它名稱: 1016-1656
XR16C850IM-F-ND
XR16C850
xr
2.97V TO 5.5V UART WITH 128-BYTE FIFO
REV. 2.3.1
24
2.22
Internal Loopback
The 850 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 16 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 at logic 1 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 to a logic 1 during loopback
test else upon exiting the loopback test the UART may detect and report a false “break” signal.
FIGURE 16. INTERNAL LOOPBACK
TX
RX
M
odem
/
G
ene
ra
lP
u
rpos
e
C
ontr
o
lLogic
In
ter
n
al
Data
Bus
Lines
an
d
C
o
ntrol
Signals
RTS#
MCR bit-4=1
VCC
Transmit Shift Register
(THR/FIFO)
Receive Shift Register
(RHR/FIFO)
CTS#
DTR#
DSR#
RI#
CD#
OP1#
OP2#
RTS#
CTS#
DTR#
DSR#
RI#
CD#
VCC
OP2#
VCC
OP1#
相關(guān)PDF資料
PDF描述
MAX7311ATG+T IC I/O EXPANDER I2C 16B 24TQFN
XR16L2551IL-F IC UART FIFO 16B DUAL 32QFN
XR68C192CV-F IC UART FIFI DUAL 44LQFP
ST16C2550IQ48-F IC DUART FIFO 16B 48TQFP
XR16C850CM-F IC UART FIFO 128B 48TQFP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR16C850IMTR-F 功能描述:UART 接口集成電路 UART W/128 BYTE FIFO 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
XR16C850IP 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UART|CMOS|DIP|40PIN|PLASTIC
XR16C850IQ 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UART|CMOS|QFP|52PIN|PLASTIC
XR16C854 制造商:EXAR 制造商全稱:EXAR 功能描述:并轉(zhuǎn)串4串口擴(kuò)展芯片
XR16C854CJ 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: