CHAPTER 5 MEMORY ACCESS CONTROL FUNCTION
User’s Manual U12688EJ4V0UM00
154
Bit Position
Bit Name
Function
Refresh Count Clock
Specifies the refresh count clock (T
RCY
).
RCCn1
RCCn0
Refresh Count Clock (T
RCY
)
0
0
32/
φ
0
1
128/
φ
1
0
256/
φ
1
1
Setting prohibited
9, 8
RCCn1,
RCCn0
Refresh Interval
Sets the interval factor of the interval timer for generation of refresh timing.
RIn5
RIn4
RIn3
RIn2
RIn1
RIn0
Interval Factor
0
0
0
0
0
0
1
0
0
0
0
0
1
2
0
0
0
0
1
0
3
0
0
0
0
1
1
4
1
1
1
1
1
1
64
5 to 0
RIn5 to
RIn0
Caution After refresh enable, if changing the refresh count clock or the interval factor, first clear the
RENn bit (0) (refresh disable state), then perform reset.
Remark
n = 0 to 3
φ
= Internal system clock frequency
...
...
...
...
...
...
...
Содержание V850E/MS1 UPD703100
Страница 2: ...User s Manual U12688EJ4V0UM00 2 MEMO ...
Страница 6: ...User s Manual U12688EJ4V0UM00 6 MEMO ...
Страница 8: ...User s Manual U12688EJ4V0UM00 8 MEMO ...
Страница 12: ...User s Manual U12688EJ4V0UM00 12 MEMO ...
Страница 26: ...User s Manual U12688EJ4V0UM00 26 MEMO ...
Страница 68: ...User s Manual U12688EJ4V0UM00 68 MEMO ...
Страница 124: ...User s Manual U12688EJ4V0UM00 124 MEMO ...
Страница 198: ...User s Manual U12688EJ4V0UM00 198 MEMO ...
Страница 230: ...User s Manual U12688EJ4V0UM00 230 MEMO ...
Страница 422: ...User s Manual U12688EJ4V0UM00 422 MEMO ...