SN8P1600
8-bit micro-controller
SYSTEM MODE SWITCHING
Switch normal/slow mode to power down (sleep) mode.
CPUM0 = 1
B0BSET
FCPUM0
; set the system into power down mode.
During the sleep, only the wakeup pin and reset can wakeup the system back to the normal mode.
Switch normal mode to slow mode.
B0BSET
B0BSET
FCLKMD
FSTPHX
;To set CLKMD = 1, Change the system into slow mode
;To stop external high-speed oscillator for power saving.
Switch slow mode to normal mode
If external high clock stop and program want to switch back normal mode. It is necessary to delay at least 10mS for
external clock stable.
B0BCLR
FSTPHX
; Turn on the external high-speed oscillator.
B0MOV
DECMS
JMP
Z, #27
Z
@B
; If VDD = 5V, internal RC=32KHz (typical) will delay
; 0.125ms X 81 = 10.125ms for external clock stable
@@:
;
B0BCLR
FCLKMD
; Change the system back to the normal mode
SONiX TECHNOLOGY CO., LTD
Page 49
Revision 1.94
SONIX [ SONIX TECHNOLOGY COMPANY ]
