參數(shù)資料
型號: HD40A4639R
廠商: Hitachi,Ltd.
英文描述: 4-Bit Single-Chip Microcomputer(4位單片微計算機)
中文描述: 4位單片機(4位單片微計算機)
文件頁數(shù): 37/133頁
文件大?。?/td> 803K
代理商: HD40A4639R
HD404639R Series
37
Bit
Initial value
Read/Write
Bit name
3
0
W
SSR13
2
0
W
SSR12
0
0
W
SSR10
1
0
W
SSR11
System clock select register 1 (SSR1: $029)
400 kHz
800 kHz
2 MHz
4 MHz
3.58 MHz
8 MHz
7.16 MHz
0
1
Don’t care
1
Don’t care
0
1
ratio selection
f
SUB
= f
X
/8
f
SUB
= f
X
/4
SSR13
0
1
32-kHz oscillation stop
Oscillation operates in stop mode
Oscillation stops in stop mode
32-kHz oscillation division
SS
0
1
0
1
0
1
0
1
0
1
Don’t care
1
Don’t care
System clock
selection
SSR23
SSR22
SSR11
SSR10
Figure 24 System Clock Select Register 1 (SSR1)
GND
X2
X1
RESET
OSC
2
OSC
1
TEST
GND
Figure 25 Typical Layouts of Crystal and Ceramic Oscillator
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