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Operating Mode
5-4
5.3
Low Power Mode
Low power consumption is achieved by stopping the oscillation of the oscillators and the clock generator (CG) and
stopping the clocks supplied to the CPU and peripheral circuits. Low power mode contains the following three
modes and transitions to the three modes are made through software.
Stop mode (STOP)
In this mode, the oscillation of oscillators as well as the CG oscillation are stopped. In the STOP mode,
oscillator and CG operation is started by an interrupt and the microcontroller changes to normal operation
mode (NORMAL) after waiting for oscillation to be stabilized.
Halt mode (HALT)
In this mode, the oscillators and CG are oscillating but clock supply to the CPU and peripheral circuits is
stopped. Thus, CPU and peripheral circuits operation is stopped.
In the HALT mode, the microcontroller changes to normal operation mode (NORMAL) when an interrupt
occurs.
Sleep mode (SLEEP)
In this mode, the oscillators and CG are oscillating but clock supply only to the CPU is stopped. Thus, CPU
operation is stopped but the peripheral circuits are operating. In SLEEP mode, the microcontroller changes
to normal operation mode (NORMAL) when an interrupt occurs.
■
Operation of various peripheral functions in the low power consumption modes
The operation of the peripheral functions in SLEEP, HALT, and STOP mode is shown in the table below.
In SLEEP mode, all peripheral functions operate except for the bus controller and the watchdog timer. In
HALT and STOP mode, most peripheral functions are stopped.
In SLEEP mode, the interrupt controller accepts interrupt requests from the peripheral blocks and external pin
interrupt requests, notifies the CPU core, and then initiates recovery from SLEEP mode. In HALT/STOP
mode, the interrupt controller accepts the external pin interrupt request, notifies the CPU core, and then initiates
recovery from HALT/STOP mode.
When making a transition to HALT/SLEEP mode, stop the watchdog timer by clearing the WDCNE bit to "0"
in watchdog timer control register WDCTR.
SLEEP
HALT
STOP
Bus controller
Only responds to DRAM refresh
Stopped
Stopped
and external bus requests
Interrupt controller
Operates
Operates
Operates
8-bit timer
Operates
Stopped
Stopped
16-bit timer
Operates
Stopped
Stopped
Watchdog timer
Stopped
Stopped
Stopped
Serial interface
Operates
Stopped
Stopped
A/D converter
Operates
Stopped
Stopped
Summary of Contents for MN103001G/F01K
Page 1: ...MICROCOMPUTER MN1030 MN103001G F01K LSI User s Manual Pub No 23101 050E ...
Page 2: ......
Page 4: ......
Page 6: ......
Page 8: ......
Page 9: ...Table of Contents List of Figures and Tables 0 ...
Page 26: ...xviii ...
Page 27: ...1 0 1 General Specifications ...
Page 35: ...2 CPU 2 ...
Page 57: ...3 Extension Instruction Specifications 3 ...
Page 96: ...Extension Instruction Specifications 3 40 ...
Page 97: ...4 Memory Modes 3 4 ...
Page 102: ...Memory Modes 4 6 ...
Page 103: ...5 Operating Mode 5 ...
Page 107: ...6 Clock Generator 6 13 ...
Page 111: ...7 Internal Memory 7 ...
Page 114: ...Internal Memory 7 4 ...
Page 115: ...8 Bus Controller BC 8 ...
Page 189: ...9 Interrupt Controller 9 ...
Page 220: ...Interrupt Controller 9 32 ...
Page 221: ...10 8 bit Timers 9 10 ...
Page 254: ...8 bit Timers 10 34 ...
Page 255: ...11 16 bit Timers 11 ...
Page 292: ...16 bit Timers 11 38 ...
Page 293: ...12 Watchdog Timer 11 12 ...
Page 302: ...Watchdog Timer 12 10 ...
Page 303: ...13 Serial Interface 13 ...
Page 354: ...Serial Interface 13 52 ...
Page 355: ...14 A D Converter 14 ...
Page 367: ...15 I O Ports 15 ...
Page 431: ...16 Internal Flash Memory 16 ...
Page 439: ...17 17 Ordering Mask ROM ...
Page 442: ...Ordering Mask ROM 17 4 ...
Page 443: ...Appendix ...