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参数资料
| 型号： | XR16V2550IM-0B-EB |
| 厂商： | Exar Corporation |
| 文件页数： | 13/46页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR V2550 48TQFP |
| 标准包装： | 1 |
| 系列： | * |
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XR16V2550
20
HIGH PERFORMANCE DUART WITH 16-BYTE FIFO
REV. 1.0.3
2.20
Internal Loopback
The V2550 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 12 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 12. INTERNAL LOOP BACK IN CHANNEL A AND B
TXA/TXB
RXA/RXB
Modem
/Ge
n
er
al
Pur
p
os
e
Co
nt
rol
Logic
In
tern
al
Da
ta
Bu
s
Lines
a
nd
Co
n
tro
lSign
a
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#
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XR16V2550IM-F | 功能描述:UART 接口集成电路 2.5V-3.6V 16B FIFO temp -45 to 85C;UART RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| XR16V2550IMTR-F | 制造商:Exar Corporation 功能描述:UART 2-CH 16Byte FIFO 2.5V/3.3V 48-Pin TQFP T/R 制造商:Exar Corporation 功能描述:XR16V2550IMTR-F |
| XR16V2551 | 制造商:EXAR 制造商全称:EXAR 功能描述:HIGH PERFORMANCE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE |
| XR16V2551_07 | 制造商:EXAR 制造商全称:EXAR 功能描述:HIGH PERFORMANCE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE |
| XR16V2551IL | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
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