PD178002_15 Datasheet, PDF (28/50 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLERS

µPD178002, 178003
7. STANDBY FUNCTION
The following two standby functions are available for further reduction of system current consumption.
• HALT mode: In this mode, the CPU operation clock is stopped. The average current consumption can be
reduced by intermittent operation by combining this mode with the normal operation mode.
• STOP mode: In this mode, oscillation of the system clock is stopped. All the operations performed on the
system clock are suspended, resulting in extremely small power consumption.
Figure 7-1. Standby Function
System clock operation
Interrupt
request
STOP
instruction
Interrupt
request
STOP mode
(System clock
oscillation stopped)
HALT
instruction
HALT mode
(Clock supply to CPU
halted, oscillation
maintained)
8. RESET FUNCTION
The following two reset methods are available.
• External reset by RESET signal input
• Internal reset by Power On Clear (POC).
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Data Sheet U12628EJ3V0DS00