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IRCC 데이터시트(PDF) 59 Page - SMSC Corporation

부품명 IRCC
상세설명  INFRARED COMMUNICATIONS CONTROLLER
PDF  79 Pages
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제조업체  SMSC [SMSC Corporation]
홈페이지  http://www.smsc.com
Logo SMSC - SMSC Corporation

IRCC 데이터시트(HTML) 59 Page - SMSC Corporation

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59
Receive Timing
Once enabled using the SCE Modes bits in Line
Control Register B, the IrDA-mode receiver
begins searching for valid FIR frames.
The
affects of non-valid IrDA infrared activity such as
out of spec pulse widths and invalid BOF
sequences are always reflected in the status
indicators in the IrCC registers. When a valid
BOF is detected, the EOM from the previous
message is disabled, errors are reset, and an
nActive Frame Interrupt is sent (Figure 26).
EOM and the EOM Interrupt are enabled
following an active FCS.
Framing errors or a FIFO overrun that occurs
before the Frame Check Sequence is complete
is indicated in the appropriate status register bits
and the message is aborted (Figure 27).
EOF
FCS
I
C
A
BOF
FIFO Empty
EOM Interrupt
Rx Enable
Active Frame
Active Frame Int.
EOM
FIGURE 26 - IrDA RX MESSAGE TIMING
I
C
A
BOF
FIFO Full
EOM Interrupt
Rx Enable
Active Frame
EOM
Active Frame Int.
Overrun Error
Abort Error
FIGURE 27 - IrDA FIR RX ABORT ON OVERRUN TIMING



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