
98
LCO (displayList Count)
Register address
HostBaseAddress + 44h
Bit #
Bit field name
R/W
Default
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Reserved
LCO
R0
RW
0
Don
’
t care
This register sets the DisplayList. transfer word count. When 1 is set, 1-word
data is transferred. When 0 is set, it is considered to be the maximum
number and 16M (16,777,216) words of data are transferred. The contents
set at this register do not change until another value is set.
LREQ (displayList transfer REQuest)
Register address
HostBaseAddress + 48h
Bit #
Bit field name
R/W
Default
7
6
5
4
3
2
1
0
Reserved
LREQ
R0
RW1
0
0
This register triggers DisplayList transfer from the Graphics Memory.
Transfer is started by setting LREQ to 1. DisplayList. The DisplayList is
transferred from the Graphics Memory to the internal display list FIFO.
Access to the display list FIFO by the CPU or DMA is prohibited while this
transfer is in progress.
7.1.2 Graphics Memory Interface Registers
MMR (Memory I/F Mode Register)
Register address
HostBaseAddress + FFFCh
Bit #
Bit field name
R/W
Default
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Reserve
TRRD
TRC
TRP
TRAS
TRCD
LOWD
RTS
RAW
ASW
CL
W0
RX
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
00
Don
’
t care
11
1001
11
110
11
10
0111
10
1
011
This register controls the graphics memory interface mode setting. An
appropriate value must be set at this register after reset (even if the default
value is used). This register is not initialized by a software reset.
Bits 2-0
CL (CAS Latency)
Set CAS latency cycles. Set same value at mode register of SDRAM.
011
CL3
010
CL2
Others
Prohibited