SN8P2711A
8-Bit Micro-Controller
SONiX TECHNOLOGY CO., LTD
Page 56
Version 0.1
5
5
5
SYSTEM OPERATION MODE
5.1 OVERVIEW
The chip is featured with low power consumption by switching around four different modes as following.
z
Normal mode (High-speed mode)
z
Slow mode (Low-speed mode)
z
Power-down mode (Sleep mode)
z
Green
mode
Power Down Mode
(Sleep Mode)
Slow Mode
Green Mode
Normal Mode
CLKMD = 1
CLKMD = 0
P0 Wake-up Function Active.
External Reset Circuit Active.
CPUM1, CPUM0 = 01.
CPUM1, CPUM0 = 10.
P0 Wake-up Function Active.
TC0 Timer Time Out as TC0GN = 1.
External Reset Circuit
Active.
P0 Wake-up Function Active.
TC0 Timer Time Out as TC0GN = 1.
External Reset Circuit Active.
System Mode Switching Diagram
Operating mode description
MODE NORMAL
SLOW
GREEN
POWER DOWN
(SLEEP)
REMARK
EHOSC
Running
By STPHX
By STPHX
Stop
IHRC
Running
By STPHX
By STPHX
Stop
ILRC
Running Running Running
Stop
CPU instruction
Executing Executing
Stop
Stop
TC0 timer
*Active
*Active *Active Inactive
*Active if TC0ENB = 1
TC1 timer
*Active
*Active *Active Inactive
*Active if TC1ENB = 1
Watchdog timer
By Watch_Dog
Code option
By Watch_Dog
Code option
By Watch_Dog
Code option
By Watch_Dog
Code option
Refer to code option
description
Internal interrupt
All active
All active
TC0, TC1
All inactive
External interrupt
All active
All active
All active
All active
Wakeup source
-
-
P0, TC0 Reset
P0, Reset
EHOSC
: External high clock
IHRC
: Internal high clock (16M RC oscillator)
ILRC
: Internal low clock (16K RC oscillator at 3V, 32K at 5V)