SH7101 Datasheet, PDF (423/486 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

17. Power-Down Modes
Reset state
Program execution state
RES pin = High
SLEEP instruction
Program-halted state
SSBY = 0
Sleep mode
(main clock)
Normal-operation
mode
(main clock)
SLEEP
instruction
External
interrupt *
SSBY = 1
Software
standby mode
: Transition after exception processing
: Power-down mode
Notes: *
NMI and IRQ
• When a transition is made between modes by means of an interrupt, the transition cannot be
made on interrupt source generation alone. Ensure that interrupt handling is performed after
accepting the interrupt request.
• In any state, a transition to the reset state occurs when RES is driven low.
Figure 17.1 Mode Transition Diagram
17.1 Input/Output Pins
Table 17.2 lists the pins relating to power-down mode.
Table 17.2 Pin Configuration
Pin Name
RES
MRES
I/O
Input
Input
Function
Power-on reset input pin
Manual reset input pin
Rev.2.00 Sep. 27, 2007 Page 389 of 448
REJ09B0394-0200