5. Power-Down Modes
Rev.3.00 Jul. 19, 2007 page 118 of 532
REJ09B0397-0300
Example: Direct transfer time for the H8/3857 Group and H8/3854 Group
(when CPU clock frequency is
φ
w/8 and wait time is 8192 states)
= (2 + 1)
×
8tw + (8192 + 14)
×
16tosc = 24tw + 131296tosc
Legend:
tosc:
OSC clock cycle time
tw:
Watch clock cycle time
tcyc:
System clock (
φ
) cycle time
tsubcyc: Subclock (
φ
SUB
) cycle time
5.8.3 Notes
on
External Input Signal Changes before/after Direct Transition
1. Direct transition from active (high-speed) mode to subactive mode
Since the mode transition is performed via watch mode, see section 5.3.5, Notes on External
Input Signal Changes before/after Standby Mode.
2. Direct transition from active (medium-speed) mode to subactive mode
Since the mode transition is performed via watch mode, see section 5.3.5, Notes on External
Input Signal Changes before/after Standby Mode.
3. Direct transition from subactive mode to active (high-speed) mode
Since the mode transition is performed via watch mode, see section 5.3.5, Notes on External
Input Signal Changes before/after Standby Mode.
4. Direct transition from subactive mode to active (medium-speed) mode
Since the mode transition is performed via watch mode, see section 5.3.5, Notes on External
Input Signal Changes before/after Standby Mode.
Summary of Contents for F-ZTAT H8 Series
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