參數(shù)資料
型號(hào)： HE84761
廠商： King Billion Electronics Co., Ltd.
英文描述： 8-bit Micro-controller
中文描述： 8位微控制器
文件頁(yè)數(shù)： 12/30頁(yè)
文件大?。?/td> 456K
代理商： HE84761
King Billion Electronics Co., Ltd
駿
億
電
子
股
份
有
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公
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HE84761
HE80000 SERIES
when battery is low, then the level of LVL2 can only be set at 1.9 volts max.
August 15, 2003
This specification is subject to change without notice. Please contact sales person for the latest version before use.
Page 12 of 30
V1.2
Voltage charge pump:
The LVL2 is then pumped to LVL5 based on the bias setting of MO_LBSR[3..0].
The formula for LVL5 is:
LVL5 = LVL2 / 2 x (1/Bias)
The potential difference between bias voltages LVL1 ~ LVL5 is determined by the bias settings, too.
LVL5
LVL4
LVL3
LVL2
LVL1
1
1
1
1
3 ~ 6.5
Voltage
Difference
Ratio
For example, if the bias setting is 1/7 bias and LVL2 is 2 volts, the LVL5 will be pumped to 7 volts when
the load is light.
Bias 5.0
5.5
6.0
LVL5 = LCD Panel Operating Voltage
2.40 6.00 6.60 7.20 7.80 8.40
2.30 5.75 6.33 6.90 7.48 8.05
2.20 5.50 6.05 6.60 7.15 7.70 8.25
2.10 5.25 5.78 6.30 6.83 7.35 7.88 8.40
2.00 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50
1.90 4.75 5.23 5.70 6.18 6.65 7.13 7.60 8.08 8.55
1.80 4.50 4.95 5.40 5.85 6.30 6.75 7.20 7.65 8.10 8.55
1.70 4.25 4.68 5.10 5.53 5.95 6.38 6.80 7.23 7.65 8.08 8.5
6.5
7.0
7.5
8.0
8.5
9.0
9.5 10.0
Min. VDD LVL2
2.70
2.60
2.50
2.40
2.30
2.20
2.10
2.00
Please note that external connections of charge pump capacitors must be made according to the bias
setting, too. Please use the following figure as reference when designing application circuit and LVL5
must be lower than 8.5 volts to prevent chip from breaking down.
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