BC68F2130 Datasheet, PDF (46/148 Pages) Holtek Semiconductor Inc – Sub-1GHz RF Transmitter Flash MCU

BC68F2130/BC68F2140
Sub-1GHz RF Transmitter Flash MCU
NORMAL Mode to SLOW Mode Switching
When running in the NORMAL Mode, which uses the high speed system oscillator, and therefore
consumes more power, the system clock can switch to run in the SLOW Mode by set the
CKS2~CKS0 bits to “111” in the SCC register. This will then use the low speed system oscillator
which will consume less power. Users may decide to do this for certain operations which do not
require high performance and can subsequently reduce power consumption.
The SLOW Mode is sourced from the LIRC oscillator and therefore requires this oscillator to be
stable before full mode switching occurs.
NORMAL Mode
PWDN=0
CKS�~CKS0 = 111
SLOW Mode
PWDN=0� FHIDEN=0� FSIDEN=0
HALT instruction is executed
SLEEP Mode
PWDN=0� FHIDEN=0� FSIDEN=1
HALT instruction is executed
IDLE0 Mode
PWDN=0� FHIDEN=1� FSIDEN=1
HALT instruction is executed
IDLE1 Mode
PWDN=0� FHIDEN=1� FSIDEN=0
HALT instruction is executed
IDLE2 Mode
PWDN=1
HALT instruction is executed
DEEP SLEEP Mode
Rev. 1.10
46
May 19, 2017