SN8P2604
8-Bit Micro-Controller
SONiX TECHNOLOGY CO., LTD
Page 51
Version 1.1
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.
Normal mode (High-speed mode)
Slow mode (Low-speed mode)
Power-down mode (Sleep mode)
Green mode
Power Down Mode
(Sleep Mode)
Slow Mode
Green Mode
Normal Mode
CLKMD = 1
CLKMD = 0
P0, P1 Wake-up Function Active.
External Reset Circuit Active.
CPUM1, CPUM0 = 01.
CPUM1, CPUM0 = 10.
P0, P1 Wake-up Function Active.
T0 Timer Time Out.
External Reset Circuit
Active.
P0 Wake-up Function Active.
T0 Timer Time Out.
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
ILRC Running
Running
Running Stop
CPU instruction
Executing Executing
Stop
Stop
T0 timer
*Active
*Active
*Active
Inactive
* Active if T0ENB=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
T0, TC1
All inactive
External interrupt
All active
All active
All active
All inactive
Wakeup source
-
-
P0, P1, T0
Reset
P0, P1, Reset
EHOSC
: External high clock
ILRC
: Internal low clock (16K RC oscillator at 3V, 32K at 5V)