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Section 19 Serial Communication Interface with FIFO (SCIF)
Rev. 4.00 Sep. 14, 2005 Page 699 of 982
REJ09B0023-0400
19.3.7
Serial Status Register (SCFSR)
The serial status register (SCFSR) is a 16-bit register. The upper 8 bits indicate the number of
receives errors in the SCFRDR data, and the lower 8 bits indicate the status flag indicating SCIF
operating state.
The CPU can always read and write to SCFSR, but cannot write 1 to the status flags (ER, TEND,
TDFE, BRK, RDF, and DR). These flags can be cleared to 0 only if they have first been read
(after being set to 1). Bits 3 (FER) and 2 (PER) are read-only bits that cannot be written. SCFSR is
initialized to H'0060 by a power-on reset.
Bit Bit
Name
Initial
value R/W Description
15
14
13
12
PER3
PER2
PER1
PER0
0
0
0
0
R
R
R
R
Number of Parity Errors
Indicate the quantity of data including a parity error in
the receive data stored in the receive FIFO data
register (SCFRDR). The value indicated by bits 15 to
12 represents the number of parity errors in SCFRDR.
When parity errors have occurred in all 16-byte
receive data in SCFRDR, PER3 to PER0 show 0.
11
10
9
8
FER3
FER2
FER1
FER0
0
0
0
0
R
R
R
R
Number of Framing Errors
Indicate the quantity of data including a framing error
in the receive data stored in SCFRDR. The value
indicated by bits 11 to 8 represents the number of
framing errors in SCFRDR. When framing errors
have occurred in all 16-byte receive data in SCFRDR,
FER3 to FER0 show 0.
Содержание HD6417641
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Страница 212: ...Section 5 Watchdog Timer WDT Rev 4 00 Sep 14 2005 Page 162 of 982 REJ09B0023 0400...
Страница 228: ...Section 6 Power Down Modes Rev 4 00 Sep 14 2005 Page 178 of 982 REJ09B0023 0400...
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Страница 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Страница 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Страница 500: ...Section 13 Direct Memory Access Controller DMAC Rev 4 00 Sep 14 2005 Page 450 of 982 REJ09B0023 0400...
Страница 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Страница 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Страница 734: ...Section 18 Multi Function Timer Pulse Unit MTU Rev 4 00 Sep 14 2005 Page 684 of 982 REJ09B0023 0400...
Страница 868: ...Section 21 A D Converter Rev 4 00 Sep 14 2005 Page 818 of 982 REJ09B0023 0400...
Страница 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Страница 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Страница 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Страница 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
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