參數(shù)資料
型號: HD66732
廠商: Hitachi,Ltd.
英文描述: Graphics Liquid Crystal Display Controller/Driver Supporting JIS Level-1 and Level-2 Kanji ROM(圖形LCD控制器/驅(qū)動器)
中文描述: 圖形液晶顯示控制器/驅(qū)動器支持日標(biāo)級- 1和第2級漢字光盤(圖形液晶顯示控制器/驅(qū)動器)
文件頁數(shù): 73/133頁
文件大小: 2608K
代理商: HD66732
HD66732
73
Oscillation Circuit
The HD66732 can either be supplied with operating pulses externally (external clock mode), oscillate using
an internal R-C oscillator with an external oscillator-resistor. External oscillator-resistors (Rf) can adjust
the oscillating frequency. When the power-supply voltage is minimized, the frequency is lowered. See the
Electrical Characteristics Notes section for the relationships between the Rf resistance value and oscillating
frequency.
1) External clock mode
2) External resistor oscillation mode
OSC1
OSC1
OSC2
Clock
Rf
HD66732
HD66732
Figure 33 Oscillation Circuits
Table 44
Relationship between Drive Duty Ratio and Frame Frequency
Number of Display Characters
6-character display
(NC = 00)
8-character display
(NC = 01)
10-character display
(NC = 10)
Recommended R-C Oscillating Frequency
Frame Frequency
45 kHz
60 kHz
76 kHz
Segment display
(NL = 001)
70 Hz
70 Hz
70 Hz
1-line display
(NL = 001)
73 Hz
71 Hz
70 Hz
2-line display
(NL = 010)
73 Hz
71 Hz
71 Hz
3-line display
(NL = 011)
69 Hz
73 Hz
71 Hz
4-line display
(NL = 100)
70 Hz
70 Hz
70 Hz
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