SONIX SN8P2501D - 5 System Operation Mode; 5.1 Overview

SN8P2501D
8-Bit Micro-Controller
SONiX TECHNOLOGY CO., LTD Page 47 Version 1.5
5
5
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
Power Down Mode
Slow Mode
CLKMD = 1
CLKMD = 0
CPUM1, CPUM0 = 01.
Wake-up condition:
P0, P1 input status is level changing.
T0 timer counter is overflow.
CPUM1, CPUM0 = 10.
Normal Mode
Green Mode
Wake-up condition:
P0, P1 input status is level changing.
T0 timer counter is overflow.
Wake-up condition:
P0, P1 input status is level changing.
Reset Control Block
One of reset trigger sources actives.
One of reset trigger sources actives.
One of reset trigger sources actives.
Operating Mode Clock Control Table
Operating
Mode
Normal Mode
Slow Mode
Green Mode
Power Down
Mode
EHOSC
Running
By STPHX
By STPHX
Stop
IHRC
Running
By STPHX
By STPHX
Stop
ILRC
Running
Running
Running
Stop
EHOSC with RTC
Running
By STPHX
Running
Stop
IHRC with RTC
Running
By STPHX
Stop
Stop
ILRC with RTC
Running
Running
Stop
Stop
CPU instruction
Executing
Executing
Stop
Stop
T0 timer
By T0ENB
By T0ENB
By T0ENB
Inactive
TC0 timer
By TC0ENB
By TC0ENB
By TC0ENB
Only PWM/Buzzer
active.
Inactive
Watchdog timer
By Watch_Dog
Code option
By Watch_Dog
Code option
By Watch_Dog
Code option
By Watch_Dog
Code option
Internal interrupt
All active
All active
T0
All inactive
External interrupt
All active
All active
All active
All inactive
Wakeup source
-
-
P0, P1, T0, Reset
P0, P1, Reset
 EHOSC: External high-speed oscillator (XIN/XOUT).
 IHRC: Internal high-speed oscillator RC type.
 ILRC: Internal low-speed oscillator RC type.