MSM6665 OKI electronic componets, MSM6665 Datasheet - Page 16

• Manufacturer Part Number: MSM6665
• Description: DOT MATRIX LCD CONTROLLER WITH 17-DOT COMMON DRIVER AND 80-DOT SEGMENT DRIVER
• Manufacturer: OKI electronic componets

¡ Semiconductor
Method of Calculating Various Types of Frequencies
• Original Clock Frequency and Blink Frequency
• Original Clock Frequency and Frame Frequency
Blink cycle calculation
([Original clock cycle] x 5) x 2
From formula 1, the blink frequency can be calculated.
Example) When the original clock is 80kHz:
Frame cycle calculation
1/9 DUTY: (Original clock cycle) x 1152 = Frame cycle ............................. Formula 2
1/17 DUTY: (Original clock cycle) x 1088 = Frame cycle ........................... Formula 3
From formulas 2 and 3, the frame frequency can be calculated.
Example) In the original clock 80kHz and 1/17 DUTY specifications:
Clock cycle Ts=12.5 [ s]
From formula 1,
Blink cycle Tb=(12.5 x 10
Thus,
Blink frequency = 1 [Hz]
Clock cycle Ts=12.5 [ s]
From formula 3,
Frame cycle Tf=12.5 x 10
Thus,
Frame frequency = 73.5 [Hz]
14
= Blink cycle ............................................. Formula 1
-6
-6
x 1088 = 13.6 [ms]
x 5) x 2
14
= 1.024 [s]
MSM6665-xx
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