參數(shù)資料
型號: HD404338
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系列微電腦(4位單片微計(jì)算機(jī))
文件頁數(shù): 22/78頁
文件大小: 491K
代理商: HD404338
HD404339 Series
22
The MCU automatically provides an oscillation stabilization period t
RC
when operation switches from
watch mode to active mode. The interrupt frame period T and one of three values for t
RC
can be selected
with the miscellaneous register (MIS: $00C), as listed in figure 14.
Operation can switch directly from subactive mode to active mode, as illustrated in figure 15. In this case,
the transition time T
D
obeys the following relationship.
t
RC
< T
D
< T + t
RC
Bit
Initial value
Read/Write
Bit name
3
0
W
MIS3
2
0
W
MIS2
0
0
W
MIS0
1
0
W
MIS1
Miscellaneous register (MIS: $00C)
MIS1
0
MIS0
T
*
1
0
0.24414 ms
t
RC
*
1
0.12207 ms
0.24414 ms
*
2
7.8125 ms
62.5 ms
Oscillation Circuit Conditions
External clock input
Ceramic oscillator
0
1
1
1
0
1
15.625 ms
125 ms
Not used
Notes: 1.
2.
The values of T and t
RC
are applied when a 32.768-kHz crystal oscillator is used.
The value is applied only when direct transfer operation is used.
Buffer control.
Refer to figure 24.
MIS3
MIS2
Crystal oscillator
Figure 14 Miscellaneous Register
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