參數(shù)資料
型號(hào): μPD4811650
廠商: NEC Corp.
英文描述: 16M Synchronous Graphics Memory (SGRAM)(16M同步圖形存儲(chǔ)器)
中文描述: 1,600同步圖形存儲(chǔ)器(SGRAM)(1,600同步圖形存儲(chǔ)器)
文件頁數(shù): 11/96頁
文件大?。?/td> 1517K
代理商: ΜPD4811650
11
μ
PD4811650 for Rev. E
Preliminary Data Sheet
No operation
(/CS, DSF = Low, /RAS, /CAS, /WE = High)
This command is not a execution command. No operations begin or
terminate by this command.
Fig.10 No operation
Add
A9
/WE
/CAS
/RAS
/CS
CKE
CLK
H
(Bank address)
DSF
Special register set command
(/CS, /RAS, /CAS, /WE = Low, DSF = High)
The
μ
PD4811650 has two special registers for graphics commands. One is
color register and the other is mask register. In this command, A0 through
A10 are the data input pins for the register select (color or mask register).
DQ0 through DQ31 are the data input pins for the Color data or the WPB
data.
During 2 CLK (t
RSC
) following this command, the
μ
PD4811650 can not
accept any other commands.
Refer to
8. Programming the Special Register
.
Fig.11 Special register set command
/WE
/CAS
/RAS
/CS
CKE
CLK
H
DSF
Add
A9
A10
DQi
Color/Mask
Masked block write command
(/CS, /CAS, /WE = Low, /RAS, DSF = High)
This command activates 8-column block write function. In this command,
the burst length = 1. Write data comes from color register, column address
mask data is input from DQi in this command.
Refer to
13. Block Write
.
Fig.12 Masked block write command
/WE
/CAS
/RAS
/CS
CKE
CLK
H
DSF
Add
A9
A10
DQi
Column Mask
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