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參數(shù)資料
| 型號(hào)： | HD404618TF |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 4-Bit Single-Chip Microcomputer |
| 中文描述： | 4位單片機(jī) |
| 文件頁數(shù)： | 29/89頁 |
| 文件大?。?/td> | 358K |
| 代理商： | HD404618TF |
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HD404618 Series
29
Stop mode
Oscillator
Internal clock
RESET
STOP instruction execution
t > t (stabilization time)
t
res
Figure 12 Timing of Stop Mode Cancellation
Watch Mode:
The MCU enters watch mode if the STOP instruction is executed in active mode when
TMA3 = 1, or if the STOP or SBY instruc-tion is executed in subactive mode.
Watch mode is terminated by a RESET input or a timer-A/
INT
0
interrupt request. For details of RESET
input, refer to the Stop Mode section. When terminated by a timer-A/
INT
0
interrupt request, the MCU
enters active mode if LSON is 0, or subactive mode if LSON is 1. After an interrupt request is generated,
the time required to enter active mode is t
RC
for a timer A interrupt, and T
X
(where T + t
RC
< T
X
< 2T + t
RC
)
for an
INT
0
interrupt, as shown in figure 13.
Operation during mode transition is the same as that at standby mode cancellation (figure 12).
Active mode
Watch mode
Active mode
Oscillation
stabilization period
Interrupt strobe
INT
Interrupt request
generation
(During the transition
from watch mode to
active mode only)
0
T
T
t
RC
Tx
T = 2
×
t
: Interrupt frame length
t
RC
: Oscillation stabilization period
Figure 13 Interrupt Frame
Subactive Mode:
The CPU operates with a clock generated by the X1 and X2 oscillation circuits.
Functions that can operate in subactive mode are listed in table 16. When the STOP or SBY instruction is
executed in subactive mode, the MCU enters either watch or active mode, depending on the statuses of
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