ST16C1551 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'ST16C1551' PDF : 37 Pages View PDF
áç
REV. 4.2.0
ST16C1550/51
2.97V TO 5.5V UART WITH 16-BYTE FIFO
FIGURE 12. RECEIVE READY & INTERRUPT TIMING [NON-FIFO MODE]
RX
Start
Bit
D0:D7
Stop
Bit
D0:D7
TSSR
TSSR
1 Byte
1 Byte
INT
in RHR
in RHR
TSSR
TSSR
RXRDY
(ISR bit-5)
Active
Data
Ready
TRR
Active
Data
Ready
TRR
D0:D7
TSSR
1 Byte
in RHR
TSSR
Active
Data
Ready
TRR
IOR#
(Reading data
out of RHR)
RXNFM
FIGURE 13. TRANSMIT READY & INTERRUPT TIMING [NON-FIFO MODE]
TX
(Unloading)
INT*
Start
Bit
D0:D7
Stop
Bit
D0:D7
IER[1] INT cleared*
enabled
IER[1] INT cleared*
enabled
TSRT
TXRDY
(ISR bit-4)
TWT
IOW#
(Loading data
into THR)
TSRT
TWT
*INT is cleared when the ISR is read and IER[1] is disabled.
D0:D7
IER[1] INT cleared*
enabled
TSRT
TWT
TXNonFIFO
29
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