參數(shù)資料
型號: HD4074654S
廠商: Hitachi,Ltd.
英文描述: 4-Bit Single-Chip Microcomputer
中文描述: 4位單片機
文件頁數(shù): 32/109頁
文件大?。?/td> 430K
代理商: HD4074654S
HD404654 Series
32
Bit
Initial value
Read/Write
Bit name
3
Not used
2
Not used
0
0
W
SSR10
1
0
W
SSR11
System clock select register 1 (SSR1: $029)
System clock selection
400 kHz
800 kHz
2 MHz
4 MHz
3.58 MHz
SSR10
0
1
0
1
SSR11
0
0
1
1
SSR22
0
0
0
0
1
×
×
×
: Don’t care
Figure 18 System Clock Select Register 1
Bit
Initial value
Read/Write
Bit name
3
Not used
2
0
W
SSR22
0
Not used
1
Not used
System clock select register 2 (SSR2: $02A)
SSR22
0
1
System clock selection
Selected from 400 kHz, 800 kHz,
2 MHz, 4 MHz
Note:
*
3.58 MHz
*
Refer to system clock select register 1 (SSR1) of figure 18.
Figure 19 System Clock Select Register 2
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