3069RF-ZTAT Datasheet, PDF (729/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

Clock
oscillator
RES
STBY
Oscillator
settling time
Reset
exception
handling
Figure 20.2 Hardware Standby Mode Timing
20.5.4 Timing for Hardware Standby Mode at Power-On
Figure 20.3 shows the timing relationships for entering hardware standby mode when the power is
turned on.
To make a transition to hardware standby mode when the power is turned on, hold the RES pin
low for the stipulated time while keeping the STBY pin high. After the reset is cleared, set the
STBY pin low.
For details on exiting hardware standby mode, see section 20.5.3, Timing for Hardware Standby
Mode.
Power
supply
RES
Reset period
STBY
Hardware standby
mode
Figure 20.3 Timing for Hardware Standby Mode at Power-On
Rev. 5.0, 09/04, page 707 of 978