參數(shù)資料
型號(hào)： HT46R65-56
廠商： Holtek Semiconductor Inc.
英文描述： A/D with LCD Type 8-Bit MCU
中文描述： 在A / D液晶型8位微控制器
文件頁數(shù)： 29/48頁
文件大?。?/td> 409K
代理商： HT46R65-56
Application Circuits
ThefollowingtableshowstheC1,C2andR1valuescorrespondingtothedifferentcrystalvalues.(Forreferenceonly)
Crystal or Resonator
C1, C2
R1
4MHz Crystal
0pF
10k
4MHz Resonator
10pF
12k
3.58MHz Crystal
0pF
10k
3.58MHz Resonator
25pF
10k
2MHz Crystal & Resonator
25pF
10k
1MHz Crystal
35pF
27k
480kHz Resonator
300pF
9.1k
455kHz Resonator
300pF
10k
429kHz Resonator
300pF
10k
The function of the resistor R1 is to ensure that the oscillator will switch off should low voltage condi-
tions occur. Such a low voltage, as mentioned here, is one which is less than the lowest value of the
MCU operating voltage. Note however that if the LVR is enabled then R1 can be removed.
Note:
The resistance and capacitance for reset circuit should be designed in such a way as to ensure that the VDD is
stable and remains within a valid operating voltage range before bringing RES to high.
* Make the length of the wiring, which is connected to the RES pin as short as possible, to avoid noise
interference.
VMAX connect to VDD or VLCD or V1 refer to the table.
LCD Type
R Type
C Type
LCD bias type
1/2 bias
1/3 bias
1/2 bias
1/3 bias
VMAX
If V
DD
>V
LCD
, then VMAX connect to V
DD
,
else VMAX connect to V
LCD
If V
DD
> 3/2V
LCD
, then VMAX connect to V
DD
,
else VMAX connect to V1
HT46R65/HT46C65
Rev. 1.80
29
July 14, 2005
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