D7225G NEC, D7225G Datasheet - Page 25

• Manufacturer Part Number: D7225G
• Description: Search -----> UPD7225G
• Manufacturer: NEC

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8.
8.1 MODE SET
method, and frame frequency.
8.2 SYNCHRONIZED TRANSFER
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.
This command sets the number of time divisions for the LCD display static drive or the time-division drive, bias
This command controls display data modification.
Normally, modification of display data is performed at the rising edge of the /CS signal (transferring display data
(1) M1 and M0 specify the number of time divisions for static drive or time-division drive.
(2) M2 specifies the bias method.
(3) F1 and F0 specify the frequency division ratio which determines the frame frequency (refer to Figure 3-1).
COMMAND
M1 M0
M2
0/1 ------------------------- Static
F1
0
1
1
0
0 -------------------------- 1/3 bias method
1 -------------------------- 1/2 bias method
0
0
1
1
F0
0 ------------------- Divide-by-4 time division drive
0 ------------------- Divide-by-3 time division drive
1 ------------------- Divide-by-2 time division drive
1 ------------------- Static drive
0 ------------------- 1/2
1 ------------------- 1/2
0 ------------------- 1/2
1 ------------------- 1/2
0
0
1
0
0
1
M2 M1 M0 F1 F0
Frequency division ratio
1
7
8
9
11
0
0
0
Data Sheet S14308EJ6V0DS00
1
PD7225
25