Programming the DP8440/41
(Continued)
4.3 PROGRAMMING SELECTION
(Continued)
DIVISOR SELECT
C3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
C2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
C1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
C0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
RAS AND CAS CONFIGURATIONS AND REFRESH BEHAVIOR
C5 C4
0
0
All RAS and all CAS are selected. B0 and B1 are not used. All RAS refresh.
0
1
If C6
e
0 Non Error
Scrubbing Selected. All
CAS Selected. 2-Step
Staggered Refresh.
B1
B0 is not Used
If C6
e
1 Error
Scrubbing Selected.
All RAS Refresh.
CAS Pairs Selected.
B1
B0 is Not Used
0
1
RAS0–1
RAS2–3
0
1
RAS0–1 and CAS0–1, CAS4–5
RAS2–3 and CAS2–3, CAS6–7
1
0
If C6
e
0 Non Error
Scrubbing Selected.
All CASs Selected.
4-Step Staggered
Refresh.
B1
B0
If C6
e
1 Error
Scrubbing Selected.
All RAS Refresh.
CAS Pairs
Selected.
B1
B0
0
0
1
1
0
1
0
1
RAS0
RAS1
RAS2
RAS3
0
0
1
1
0
1
0
1
RAS0, CAS0–4
RAS1, CAS1–5
RAS2, CAS2–6
RAS3, CAS3–7
1
1
If C6
e
0 Non Error
Scrubbing. 2-Step
Staggered Refresh.
CAS Pairs Selected.
B1
B0 is not used.
If C6
e
1 Error
Scrubbing Selected.
All RAS Refresh.
CAS Pairs Selected.
B1
B0 is not used.
0
1
RAS0–1 and CAS0,1,4,5
RAS2–3 and CAS2,3,6,7
0
1
RAS0–1 and CAS0,1,4,5
RAS2–3 and CAS2,3,6,7
ERROR SCRUBBING MODE SELECT
C6
0
1
Staggered Refresh (Non Error Scrubbing)
Error Scrubbing (No CAS-before-RAS and No Staggered Refresh)
12