Notes On External Input Signal Changes Before/After Direct Transition - Renesas F-ZTAT H8 Series Hardware Manual

5. Power-Down Modes
Example: Direct transfer time for the H8/3857 Group and H8/3854 Group
(when CPU clock frequency is φw/8 and wait time is 8192 states)
= (2 + 1) × 8tw + (8192 + 14) × 16tosc = 24tw + 131296tosc
Legend:
tosc:
tw:
tcyc:
tsubcyc: Subclock (φ
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.
Rev.3.00 Jul. 19, 2007 page 118 of 532
REJ09B0397-0300
OSC clock cycle time
Watch clock cycle time
System clock (φ) cycle time
) cycle time
SUB