參數(shù)資料
型號(hào): 48e30
廠商: Holtek Semiconductor Inc.
英文描述: 8-Bit I/O Type MCU (With EEPROM)
中文描述: 8位I / O型微控制器(帶EEPROM)
文件頁數(shù): 15/44頁
文件大?。?/td> 351K
代理商: 48E30
Application Circuits
The following table shows the C1, C2 and R1 value according different crystal values.
Crystal or Resonator
C1, C2
R1
4MHz Crystal
0pF
10k
W
4MHz Resonator (3 pin)
0pF
12k
W
4MHz Resonator (2 pin)
10pF
12k
W
3.58MHz Crystal
0pF
10k
W
3.58MHz Resonator (2 pin)
25pF
10k
W
2MHz Crystal & Resonator (2 pin)
25pF
10k
W
1MHz Crystal
35pF
27k
W
480kHz Resonator
300pF
9.1k
W
455kHz Resonator
300pF
10k
W
429kHz Resonator
300pF
10k
W
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.
HT48E30
Rev. 0.00
22
January 12, 2004
Preliminary
H T 4 8 E 3 0
O S C 1
O S C 2
O S C
C i r c u i t
R E S
0 . 1 m F *
1 0 0 k W
V D D
V S S
0 . 1 m F
V D D
0 . 0 1 m F *
1 0 k W
O S C C i r c u i t
P G 0 / I N T
P A 0 ~ P A 7
P B 2 ~ P B 7
P C 1 ~ P C 5
P B 0 / B Z
P B 1 / B Z
P C 0 / T M R
O S C 1
O S C 2
C r y s t a l S y s t e m O s c i l l a t o r
F o r t h e v a l u e s ,
s e e t a b l e b e l o w
R C S y s t e m O s c i l l a t o r
2 4 k W < R O S C < 1 M W
R 1
C 1
C 2
V D D
R O S C
O S C 1
O S C 2
4 7 0 p F
N M O S o p e n d r a i n
S e e R i g h t S i d e
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