SN8P2604A
8-Bit Micro-Controller
5
SYSTEM OPERATION MODE
5.1 OVERVIEW
The chip is featured with low power consumption by switching around four different modes as following.
z
z
z
z
Normal mode (High-speed mode)
Slow mode (Low-speed mode)
Power-down mode (Sleep mode)
Green mode
Power Down Mode
(Sleep Mode)
P0, P1 Wake-up Function Active.
External Reset Circuit Active.
CPUM1, CPUM0 = 01.
CLKMD = 1
CLKMD = 0
Normal Mode
Slow Mode
P0, P1 Wake-up Function Active.
T0 Timer Time Out.
CPUM1, CPUM0 = 10.
P0, P1 Wake-up Function Active.
T0 Timer Time Out.
External Reset Circuit Active.
Green Mode
External Reset Circuit
Active.
System Mode Switching Diagram
Operating mode description
POWER DOWN
(SLEEP)
MODE
NORMAL
SLOW
GREEN
REMARK
EHOSC
ILRC
CPU instruction
T0 timer
Running
Running
Executing
*Active
By STPHX
Running
Executing
*Active
By STPHX
Running
Stop
*Active
*Active
Stop
Stop
Stop
Inactive
Inactive
* Active if T0ENB=1
* Active if TC1ENB=1
Refer to code option
description
TC1 timer
*Active
*Active
By Watch_Dog By Watch_Dog By Watch_Dog By Watch_Dog
Watchdog timer
Code option
All active
All active
Code option
All active
All active
Code option
T0, TC1
All active
P0, P1, T0
Reset
Code option
All inactive
All inactive
Internal interrupt
External interrupt
Wakeup source
-
-
P0, P1, Reset
EHOSC: External high clock
ILRC: Internal low clock (16K RC oscillator at 3V, 32K at 5V)
SONiX TECHNOLOGY CO., LTD
Page 55
Version 0.3
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