參數(shù)資料
型號: HD404449
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer(4位單片微計算機(jī))
中文描述: 4位HMCS400系列微機(jī)(4位單片微計算機(jī))
文件頁數(shù): 37/123頁
文件大小: 726K
代理商: HD404449
HD404449 Series
37
Low-power mode
operation cycle
IF = 1 and
IM = 0
Hardware NOP
execution
PC Next
Iocation
MCU operation
cycle
Standby/Watch
mode
IF = 1 and
IM = 0
Hardware NOP
execution
PC Next
Iocation
Instruction
execution
Stop mode
No
Yes
No
Yes
Note:
*
For IF and IM operation, refer to figure 15.
STOPC
= 0
RAME = 1
Reset MCU
No
Yes
*
Figure 22 MCU Operating Sequence (Low-Power Mode Operation)
Note:
When the MCU is in watch mode or subactive mode, if the high level period before the falling edge
of
INT
0
is shorter than the interrupt frame,
INT
0
is not detected. Also, if the low level period after
the falling edge of
INT
0
is shorter than the interrupt frame,
INT
0
is not detected.
Edge detection is shown in figure 23. The level of the
INT
0
signal is sampled by a sampling clock.
When this sampled value changes to low from high, a falling edge is detected.
In figure 24, the level of the
INT
0
signal is sampled by an interrupt frame. In (a) the sampled value
is low at point A, and also low at point B. Therefore, a falling edge is not detected. In (b), the
sampled value is high at point A, and also high at point B. A falling edge is not detected in this
case either.
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