参数资料
型号: SM8521
厂商: Sharp Corporation
元件分类: DC/DC变换器
英文描述: 1 watt dc-dc converters
中文描述: 1瓦的DC - DC转换器
文件页数: 34/56页
文件大小: 267K
代理商: SM8521
SM8521
- 34 -
VRAM Configulation
VRAM configulation is shown below.
VRAM, maximum 16 k bytes (160 x 200-dot x 2-
phase or 200 x 160-dot x 2-plane), can be
accessed. LCD diaplays a phase specified.
Address of VRAM0 and VRAM1 is A000
H
-BFFF
H
and C000
H
-DFFF
H
respectively.
DMA transfers rectangle display data, in arbitrary
size specified in ROM and external RAM, to
VRAM.
NOTE :
Do not write data directly to VRAM while transferring data to
LCD driver (MSB of LCC register is 1 and V-blank flag is 0).
Fig. 16 VRAM Configuration
dot 3
dot 2
dot 1
dot 0
0
1
0
1
2
3
2
3
4
5
6
Bit 7
4-dot/byte
160/200-dot
VRAM
160-dot
×
200-dot
×
2-plane = 16 k-byte
160/200-dot
dot data = 00 color 0
01 color 1
10 color 2
11 color 3
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