13-7
MB86R02 ‘Jade-D’ Hardware Manual V1.64
13.6.3 DRAM initialization command register [1] (DRIC1)
This register sets each control signal value of DRAM at the initialization operation.
When "1" is written to DRCMD in the initialization mode (DRINI = 1), the signal corresponding to
DRAM bus is driven by this setting value.
Address
F300_0000
H
+ 02
H
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Name
-
-
-
-
-
-
-
-
-
#CS
#RA
S
#CA
S
#WE BA2 BA1 BA0
R/W
R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
Initial value
X
X
X
X
X
X
X
X
X
1
1
1
1
1
1
1
13.6.4 DRAM initialization command register [2] (DRIC2)
This register sets DRAM address signal value at the initialization operation.
When "1" is written to DRCMD in the initialization mode (DRINI = 1), the signal corresponding to
DRAM bus is driven by this setting value.
Address
F300_0000
H
+ 04
H
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Name
A15 A14 A13 A12 A11 A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
R/W
R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
Initial value
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
DRAM initialization method
All DRAM is initialized by CPU.
DDR2 controller is structured that each signal conductor necessary for the DRAM setting can be
driven by the register value in the initialization mode. Set certain value to this register
beforehand and "1" to command bit (DRCMD) to execute the setting command to DRAM.
To issue "Precharge all (PALL)" command to DRAM
1)
Set "Bit[5:0] = 001000(b)" to DRAM initialization command register [1].
2)
Set "Bit[13:0] = 00010000000000(b)" to DRAM initialization command register [2].
(Setting order of these 2 registers is not specified.)
3)
Write "1" to bit 0 of DRAM initialization control register.
The value set at 1) and 2) is output to DRAM for 1ck period of time, and this
becomes command to DRAM.
•
Command to DRAM without command execution in the initialization mode is NOP or
DSEL
•
For each control method of DRAM command and initialization, refer applied DRAM data
sheet.
Summary of Contents for MB86R02
Page 24: ...MB86R02 Jade D Hardware Manual V1 64 ...
Page 76: ...3 2 MB86R02 Jade D Hardware Manual V1 64 Figure 3 1 Memory map 1 ...
Page 77: ...3 3 MB86R02 Jade D Hardware Manual V1 64 Figure 3 2 Memory map 2 ...
Page 167: ...8 8 MB86R02 Jade D Hardware Manual V1 64 ...
Page 214: ...11 7 MB86R02 Jade D Hardware Manual V1 64 15 16 cycles initial value ...
Page 497: ...18 139 MB86R02 Jade D Hardware Manual V1 64 VSYNC is output 1 dot clock faster than HSYNC ...
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Page 682: ...22 2 MB86R02 Jade D Hardware Manual V1 00 FUJITSU PROPRIETARY AND CONFIDENTIAL ...
Page 811: ...29 24 MB86R02 Jade D Hardware Manual V1 64 ...