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UPD178002 Datasheet(PDF) 26 Page - NEC

Part # UPD178002
Description  8-BIT SINGLE-CHIP MICROCONTROLLERS
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD178002 Datasheet(HTML) 26 Page - NEC

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µPD178002, 178003
Data Sheet U12628EJ3V0DS00
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
8. RESET FUNCTION
The following two reset methods are available.
• External reset by RESET signal input
• Internal reset by Power On Clear (POC).
System clock operation
STOP mode
(System clock
oscillation stopped)
HALT mode
(Clock supply to CPU
halted, oscillation
maintained)
Interrupt
request
Interrupt
request
HALT
instruction
STOP
instruction


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