h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 1055

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 23B Power-Down Modes [HD64F2636UF, HD6432636UF, HD64F2638UF,
HD6432638UF, HD64F2638WF, HD6432638WF, HD64F2639UF, HD6432639UF, HD64F2639WF,
HD6432639WF, HD64F2630UF, HD6432630UF, HD64F2630WF, HD6432630WF]
Using an External Clock: The PLL circuit requires time to stabilize, so the standby time should
be set to a value of 2 ms or more.
23B.6.4 Software Standby Mode Application Example
Figure 23B-3 shows an example in which a transition is made to software standby mode at the
falling edge on the NMI pin, and software standby mode is cleared at the rising edge on the NMI
pin.
In this example, an NMI interrupt is accepted with the NMIEG bit in SYSCR cleared to 0 (falling
edge specification), then the NMIEG bit is set to 1 (rising edge specification), the SSBY bit is set
to 1, and a SLEEP instruction is executed, causing a transition to software standby mode.
Software standby mode is then cleared at the rising edge on the NMI pin.
B
Figure 23B-3 Software Standby Mode Application Example
Rev. 6.00 Feb 22, 2005 page 995 of 1484
REJ09B0103-0600