HD404669 Datasheet, PDF (36/142 Pages) Hitachi Semiconductor – Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

HD404669 Series
Operation during mode transition is the same as that at standby mode cancellation (figure 15).
Active mode
Watch mode
Oscillation
stabilization time
Active mode
Interrupt strobe
INT₀
Interrupt request
generation
(During the transition
from watch mode to
active mode only)
T
T
t_RC
T_X
T: Interrupt frame period
t_RC : Oscillation stabilization time
Note: If the time from the fall of the INT₀ signal until the interrrupt is accepted
and active mode is entered is designated Tx, then Tx will be in the
following range:
T + t_RC < T_x < 2T + t_RC
Figure 17 Interrupt Frame
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