121
RTCOR is initialized to H'00FF by a power-on reset, but is not initialized by a manual reset or in
standby mode.
To prevent RTCOR from being written incorrectly, it must be written by a different method from
most other registers. A word transfer operation is used, H'96 is written in the upper byte, and the
actual data is written in the lower byte. For details, see section 8.2.11, Notes on Register Access.
Bit:
15
14
13
12
11
10
9
8
Bit name:
—
—
—
—
—
—
—
—
Initial value:
0
0
0
0
0
0
0
0
R/W:
—
—
—
—
—
—
—
—
Bit:
7
6
5
4
3
2
1
0
Bit name:
Initial value:
1
1
1
1
1
1
1
1
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
8.2.10
Parity Control Register (PCR)
The parity control register (PCR) is a 16-bit read/write register that selects the parity polarity and
space to be parity checked. PCR is initialized to H'0000 by a power-on reset, but is not initialized
by a manual reset or in standby mode.
Bit:
15
14
13
12
11
10
9
8
Bit name:
PEF
PFRC
PEO
PCHK1
PCHK0
—
—
—
Initial value:
0
0
0
0
0
0
0
0
R/W:
R/W
R/W
R/W
R/W
R/W
—
—
—
Bit:
7
6
5
4
3
2
1
0
Bit name:
—
—
—
—
—
—
—
—
Initial value:
0
0
0
0
0
0
0
0
R/W:
—
—
—
—
—
—
—
—
Содержание HD6417032
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Страница 525: ...490 CK RAS CAS TRp TRc TRcc tRASD1 tRASD2 tCASD3 tCASD2 TRr tCSR Figure 20 18 Self Refresh ...
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