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HD404612FS 데이터시트(PDF) 31 Page - Renesas Technology Corp

부품명 HD404612FS
상세설명  4-Bit Single-Chip Microcomputer
PDF  91 Pages
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD404612FS 데이터시트(HTML) 31 Page - Renesas Technology Corp

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HD404618 Series
29





,


Stop mode
Oscillator
Internal clock
RESET
STOP instruction execution
t
> t
(stabilization time)
RC
t res
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 TX (where T + tRC < TX < 2T + tRC)
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
TT
t RC
Tx
T = 2
× t
RC: Interrupt frame length
tRC: 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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