613
A.2.45
Parity Control Register (PCR)
BSC
•
Start Address: H'5FFFFAA
•
Bus Width: 8/16/32
Register Overview:
Bit:
15
14
1312
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
32
1
0
Bit name:
—
—
—
—
—
—
—
—
Initial value:
0
0
0
0
0
0
0
0
R/W:
—
—
—
—
—
—
—
—
Table A.46 PCR Bit Functions
Bit
Bit Name
Value
Description
15
Parity error flag (PEF)
0
No parity error
(Initial value)
Clear Condition: PEF read, then 0 written in PEF
1
Parity error occurred
14
Parity forced output
0
No forced parity output
(Initial value)
(PFRC)
1
Forced high-level output
13Parity polarity (PEO)
0
Even parity
(Initial value)
1
Odd parity
12,11
Parity check enable 1, 0
0
0
Parity not checked or generated
(Initial value)
(PCHK1, PCHK0)
0
1
Parity checked and generated in DRAM space
1
0
Parity checked and generated in DRAM space and
area 2
1
1
Reserved
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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