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UPD178024 Datasheet(PDF) 33 Page - Renesas Technology Corp

Part # UPD178024
Description  MOS INTEGRATED CIRCUIT
PDF  58 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

UPD178024 Datasheet(HTML) 33 Page - Renesas Technology Corp

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µPD178023, 178024
Data Sheet U14126EJ2V0DS00
5. STANDBY FUNCTION
There are the following two standby functions to reduce the system power consumption.
• HALT mode : The CPU operating clock is stopped.
The average consumption current can be reduced by intermittent operation in combination with
the normal operating mode.
• STOP mode : The system clock oscillation is stopped. All operations by the system clock are stopped and
current consumption can be considerably reduced.
Figure 5-1. Standby Function
6. RESET FUNCTION
There are the following three reset methods.
• External reset input by RESET pin
• Internal reset by watchdog timer runaway time detection
• Internal reset by Power-On Clear (POC).
System Clock Operation
STOP Mode
(System clock
oscillation stopped)
HALT Mode
(Clock supply to CPU is
stopped, oscillation
continued)
Interrupt
Request
Interrupt
Request
HALT
Instruction
STOP
Instruction



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