22. Serial I/O with FIFO (SIOF)
Rev.1.00 Jan. 10, 2008 Page 1112 of 1658
REJ09B0261-0100
22.3.7
Status Register (SISTR)
SISTR is a 16-bit readable/writable register that indicates the SIOF state. Each bit in this register
becomes an SIOF interrupt source when the corresponding bit in SIIER is set to 1.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
15
14
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
RFOVF
RFUDF
TFUDF
TFOVF
FSERR
SAERR
—
—
RDREQ
RFFUL
RCRDY
—
TDREQ
TFEMP
—
TCRDY
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
R
R
R
BIt:
Initial value:
R/W:
Bit Bit
Name
Initial
Value R/W Description
15
⎯
0
R
Reserved
This bit is always read as 0. The write value should
always be 0.
14
TCRDY
0
R
Transmit Control Data Ready
0: Indicates that writing to SITCR is disabled
1: Indicates that writing to SITCR is enabled
•
If SITCR is written to when this bit is cleared to 0,
SITCR is overwritten to and the previous contents of
SITCR are not output from the SIOF_TXD pin.
•
This bit is valid when the TXE bit in SITCR is set to
1.
•
This bit indicates the SIOF state. If SITCR is written
to, this bit is automatically cleared to 0.
•
To enable the issuance of this interrupt source, set
the TCRDYE bit in SIIER to 1.
13 TFEMP
0 R Transmit
FIFO
Empty
0: Indicates that transmit FIFO is not empty
1: Indicates that transmit FIFO is empty
•
This bit is valid when the TXE bit in SICTR is 1.
•
This bit indicates the SIOF state. If SITDR is written
to, this bit is automatically cleared to 0.
•
To enable the issuance of this interrupt source, set
the TFEMPE bit in SIIER to 1.
Содержание SH7781
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Страница 762: ...14 Direct Memory Access Controller DMAC Rev 1 00 Jan 10 2008 Page 732 of 1658 REJ09B0261 0100 ...
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Страница 828: ...17 Power Down Mode Rev 1 00 Jan 10 2008 Page 798 of 1658 REJ09B0261 0100 ...
Страница 846: ...18 Timer Unit TMU Rev 1 00 Jan 10 2008 Page 816 of 1658 REJ09B0261 0100 ...
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Страница 1326: ...25 Audio Codec Interface HAC Rev 1 00 Jan 10 2008 Page 1296 of 1658 REJ09B0261 0100 ...
Страница 1482: ...28 General Purpose I O Ports GPIO Rev 1 00 Jan 10 2008 Page 1452 of 1658 REJ09B0261 0100 ...
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