參數(shù)資料
型號: ST16C2450IQ48
廠商: EXAR CORP
元件分類: 微控制器/微處理器
英文描述: 2.97V TO 5.5V DUART
中文描述: 2 CHANNEL(S), 1.5M bps, SERIAL COMM CONTROLLER, PQFP48
封裝: 7 X 7 MM, 1 MM HEIGHT, TQFP-48
文件頁數(shù): 11/29頁
文件大小: 315K
代理商: ST16C2450IQ48
á
REV. 4.0.0
ST16C2450
2.97V TO 5.5V DUART
11
2.10
The 2450 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 7
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.
Internal Loopback
F
IGURE
7. I
NTERNAL
L
OOP
B
ACK
IN
C
HANNELS
A
AND
B
TXA/TXB
RXA/RXB
M
I
RTSA#/RTSB#
MCR bit-4=1
VCC
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#
VCC
相關PDF資料
PDF描述
ST16C2451 2.97V TO 5.5V DUART
ST16C2552CJ44 DUAL ASYNCHRONOUS RECEIVER/TRANSMITTER WITH FIFOs
ST16C2552IJ44 DUAL ASYNCHRONOUS RECEIVER/TRANSMITTER WITH FIFOs
ST162552 DUAL ASYNCHRONOUS RECEIVER/TRANSMITTER WITH FIFOs
ST16C2552CJ 2.97V TO 5.5V DUAL UART WITH 16-BYTE FIFO
相關代理商/技術參數(shù)
參數(shù)描述
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ST16C2451 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V DUART
ST16C2550 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V DUART WITH 16-BYTE FIFO
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