Fujitsu MB86R02 Jade-D Hardware Manual page 238

MB86R02 'Jade-D' Hardware Manual V1.64
Bit field
No. Name
6-4 TRP
3-0 TRC
Precharge time (tRP : Precharge period)
Bit[6:4] Delay time (number of
clock)
000 -
001 3
010 4
011 5
100 6
101 7
110 8
111 9
RAS cycle time (tRC : Active to active/Auto. refresh command time)
Bit[3:0] Delay time (number of clock)
0000 -
0001 -
0010 -
0011 -
0100 -
0101 -
0110 8
0111 9
1000 10
1001 11
1010 12
1011 13
1100 14
1101 15
1110 16
1111 17
Note 1: When 10 or less value is set, writing to DRAM is performed with
tRAS = 11
For ACT command interval, larger value of either rRC and rRAS+rRP+tWR is used.
Description
Reserved
(Setting prohibited)
(Initial value)
Reserved
(Setting prohibited)
(Note 1)
(Initial value)
13-11