參數(shù)資料
型號： MSM6255GS-BK
廠商： OKI ELECTRIC INDUSTRY CO LTD
元件分類： 顯示控制器
英文描述： 128 X 256 CHARACTERS DOT MAT LCD DSPL CTLR, PQFP80
封裝： 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80
文件頁數(shù)： 17/39頁
文件大?。?/td> 477K
代理商： MSM6255GS-BK
MSM6255
Semiconductor
24/39
– Relation Between Duty and Number of Lines
Number of lines is determined by Vr, number of lines in vertical direction(display duty).
Number of lines = Vr x 2
Note: In the character display mode, number of lines should not be odd number.
– Calculation of Crystal Oscillation Frequency (fosc)
Table 3 Calculation Formula of fosc
Note: (1) Table 3 shows a calculation example assuming that FRP = 70 Hz, HN = 80, Hp = 8 and
Vr = 100. However, the example of Hp = 4 to 7 in 4-bit parallel is not included.
(2) Output mode q :Hp = 4 to 7 in 1-bit serial, 2-bit parallel and 4-bit parallel
Output mode w :Hp = 8 in 4-bit parallel
– Calculation of Character Clock (CHf) Frequency
CHφ = FRP x (HN + 8) x Vr
Example: Assuming FRP = 70 Hz, HN = 80 and Vr= 100, CHf = 1.62 (ms)
– Calculation of Shift Clock (CLP) Frequency
Table 4 Calculation Formula of CLP
Output mode
Calculation formula of CLP
Calculation exmaple (MHz)
1-bit serial
RP x (HN + 8) x Hp x Vr
4.928
2-bit parallel
FRP x (HN + 8) x Hp x Vr x 1/2
2.464
4-bit parallel
FRP x (HN + 8) x Hp x Vr x 1/4
1.232
Note: Table 4 shows a calculation example assuming that FRP = 70 Hz, HN = 80, Hp = 8 and
Vr= 100.
DIV
Output mode
Calculation formula of fosc
Calculation exmaple (MHz)
q
FRP x (HN + 8) x Hp x Vr x 2
9.856
w
FRP x (HN + 8) x Vr x 4
2.464
q
FRP x (HN + 8) x Hp x Vr
4.928
w
FRP x (HN + 8) x Vr x 2
1.232
L
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