參數(shù)資料
型號: HD4074459
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer(4位單片微計(jì)算機(jī))
中文描述: 4位HMCS400系列微機(jī)(4位單片微計(jì)算機(jī))
文件頁數(shù): 41/120頁
文件大?。?/td> 692K
代理商: HD4074459
HD404459 Series
41
SSR11
0
1
System oscillation frequency selection
1.6 to 4.0 MHz
0.4 to 1.0 MHz
Bit
Initial value
Read/Write
Bit name
3
0
W
SSR13
*
2
0
W
SSR12
0
Not used
1
0
W
SSR11
System clock select register 1 (SSR1: $029)
SSR13
0
1
32-kHz oscillation stop
Oscillation operates in stop mode
Oscillation stops in stop mode
SSR12
0
1
32-kHz oscillation division ratio selection
f
sub
= fx/8
f
sub
= fx/4
Note:
*
SSR13 is reset to 0 only by RESET input. When
STOPC
is input in stop mode, SSR13
is not reset but retains its value. SSR13 is not reset in stop mode.
Figure 26 System Clock Select Register 1 (SSR1: $029)
Bit
Initial value
Read/Write
Bit name
3
Not used
2
Not used
0
0
W
SSR20
1
0
W
SSR21
System clock select register 2 (SSR2: $02A)
SSR21
0
1
System clock division ratio selection
1/4
1/8
1/16
1/32
SSR20
0
1
0
1
Figure 27 System Clock Select Register 2 (SSR2: $02A)
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