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ST16C2450CJ44 데이터시트(PDF) 10 Page - Exar Corporation

부품명 ST16C2450CJ44
상세설명  2.97V TO 5.5V DUART
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제조업체  EXAR [Exar Corporation]
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ST16C2450
xr
2.97V TO 5.5V DUART
REV. 4.0.1
10
2.10
Internal Loopback
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.
FIGURE 7. INTERNAL LOOP BACK IN CHANNELS A AND B
TXA/TXB
RXA/RXB
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


유사한 부품 번호 - ST16C2450CJ44

제조업체부품명데이터시트상세설명
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Exar Corporation
ST16C2450CJ44 EXAR-ST16C2450CJ44 Datasheet
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   2.97V TO 5.5V DUART
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