參數(shù)資料
型號(hào): UPD7225GB-3B7
廠商: NEC Corp.
英文描述: PROGRAMMABLE LCD CONTROLLER/DRIVER
中文描述: 可編程LCD控制器/驅(qū)動(dòng)
文件頁數(shù): 25/52頁
文件大?。?/td> 289K
代理商: UPD7225GB-3B7
Data Sheet S14308EJ6V0DS00
25
μ
PD7225
8.
COMMAND
8.1 MODE SET
0
1
0
M2 M1 M0 F1
F0
This command sets the number of time divisions for the LCD display static drive or the time-division drive, bias
method, and frame frequency.
(1) M1 and M0 specify the number of time divisions for static drive or time-division drive.
M1
0
1
1
0
M0
0------------------- Divide-by-4 time division drive
0------------------- Divide-by-3 time division drive
1------------------- Divide-by-2 time division drive
1------------------- Static drive
(2) M2 specifies the bias method.
M2
0 -------------------------- 1/3 bias method
1 -------------------------- 1/2 bias method
0/1------------------------- Static
(3) F1 and F0 specify the frequency division ratio which determines the frame frequency (refer to Figure 3-1).
F1
0
0
1
1
F0
0------------------- 1/2
1------------------- 1/2
0------------------- 1/2
1------------------- 1/2
Frequency division ratio
7
8
9
11
8.2 SYNCHRONIZED TRANSFER
0
0
1
1
0
0
0
1
This command controls display data modification.
Normally, modification of display data is performed at the rising edge of the /CS signal (transferring display data
from the data memory to the display data latch). However, after this command is executed, display data is modified
at the first alternate current drive cycle (Frame frequency x Number of time divisions) after the /CS signal is set to
high.
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