SN8P2740 Series
ADC, OP-amp, Comparator 8-Bit Micro-Controller
5
SYSTEM OPERATION MODE
5.1 OVERVIEW
The chip builds in four operating mode for difference clock rate and power saving reason. These modes control
oscillators, op-code operation and analog peripheral devices‟ operation.
Normal mode: System high-speed operating mode.
Slow mode: System low-speed operating mode.
Power down mode: System power saving mode (Sleep mode).
Green mode: System ideal mode.
Operating Mode Control Block
One of reset trigger sources actives.
Wake-up condition:
P0, P1 input status is level changing.
Power Down Mode
One of reset trigger sources actives.
CPUM1, CPUM0 = 01.
CLKMD = 1
CLKMD = 0
Reset Control Block
Normal Mode
Slow Mode
CPUM1, CPUM0 = 10.
Wake-up condition:
Wake-up condition:
P0, P1 input status is level changing.
T0 timer counter is overflow.
P0, P1 input status is level changing.
T0 timer counter is overflow.
Green Mode
One of reset trigger sources actives.
Operating Mode Clock Control Table
Operating
Power Down
Mode
Normal Mode
Slow Mode
Green Mode
Mode
EHOSC
IHRC
ILRC
Running
Running
Running
By STPHX
By STPHX
Running
By STPHX
By STPHX
Running
Stop
Stop
Stop
CPU instruction
T0 timer
Executing
By T0ENB
Executing
By T0ENB
Stop
Stop
Inactive
By T0ENB
By TC0ENB
(PWM active)
By Watch_Dog
Code option
T0
TC0 timer
By TC0ENB
By TC0ENB
Inactive
By Watch_Dog
Code option
All active
All active
-
By Watch_Dog
Code option
All active
All active
-
By Watch_Dog
Code option
All inactive
All inactive
P0, P1 Reset
Watchdog timer
Internal interrupt
External interrupt
Wakeup source
All active
P0, P1, T0 Reset
EHOSC: External high-speed oscillator (XIN/XOUT).
IHRC: Internal high-speed oscillator RC type.
ILRC: Internal low-speed oscillator RC type.
SONiX TECHNOLOGY CO., LTD
Page 51
Version 2.0
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