參數(shù)資料
型號(hào): S1C60A13F
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, 1.2 MHz, MICROCONTROLLER, PQFP80
封裝: PLASTIC, QFP14-80
文件頁(yè)數(shù): 53/104頁(yè)
文件大?。?/td> 850K
代理商: S1C60A13F
44
EPSON
S1C60N13 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (LCD Driver)
4.8.2 Cadence adjustment of oscillation frequency
In the S1C60N13 Series, the LCD drive duty can be set to 1/1 duty by software. This function enables
easy adjustment (cadence adjustment) of the oscillation frequency of the oscillation circuit.
The procedure to set to 1/1 duty drive is as follows:
Write "1" to the CSDC1 register at address 2E8HD3.
Write the same value to all registers corresponding to COMs 0 through 3 of the display memory.
The frame frequency is 32 Hz (fOSC1/1,024, when fOSC1 = 32.768 kHz).
Notes: Even when l/3 or 1/2 duty is selected by the mask option, the display data corresponding to all
COM are valid during 1/1 duty driving. Hence, for 1/1 duty drive, set the same value for all
display memory corresponding to COMs 0 through 3.
For cadence adjustment, set the display data corresponding to COMs 0 through 3, so that all the
LCD segments go on.
Figures 4.8.2.1 and 4.8.2.2 show the 1/1 duty drive waveform in 1/3 bias and 1/2 bias driving.
SEG
0–37
COM
0–3
Frame frequency
LCD lighting status
COM0
COM1
COM2
COM3
SEG0–37
-VC3
-VC2
-VC1
-VSS
-VC3
-VC2
-VC1
-VSS
-VC3
-VC2
-VC1
-VSS
Off
On
Fig. 4.8.2.1 Drive waveform for 1/1 duty (1/3 bias)
SEG
0–37
COM
0–3
Frame frequency
LCD lighting status
COM0
COM1
COM2
COM3
SEG0–37
-VC3
-VC1, VC2
-VSS
Off
On
-VC3
-VC1, VC2
-VSS
-VC3
-VC1, VC2
-VSS
Fig. 4.8.2.2 Drive waveform for 1/1 duty (1/2 bias)
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