Rev. 1.00
42
August 29, 2018
Rev. 1.00
43
August 29, 2018
HT45F6530
AC Voltage Regulator Flash MCU
HT45F6530
AC Voltage Regulator Flash MCU
FAST Mode
SLOW Mode
CKS2~CKS0 = 111
SLEEP Mode
FHIDEN=0, FSIDEN=0
HALT instruction is executed
IDLE0 Mode
FHIDEN=0, FSIDEN=1
HALT instruction is executed
IDLE1 Mode
FHIDEN=1, FSIDEN=1
HALT instruction is executed
IDLE2 Mode
FHIDEN=1, FSIDEN=0
HALT instruction is executed
SLOW Mode to FAST Mode Switching
In SLOW mode the system clock is derived from f
SUB
. When system clock is switched back to the
FAST mode from f
SUB
, the CKS2~CKS0 bits should be set to “000”~“110” and then the system
clock will respectively be switched to f
H
~f
H
/64.
However, if f
H
is not used in SLOW mode and thus switched off, it will take some time to re-
oscillate and stabilise when switching to the FAST mode from the SLOW Mode. This is monitored
using the HIRCF bit in the HIRCC register. The time duration required for the high speed system
oscillator stabilization is specified in the System Start Up Time Characteristics.
FAST Mode
SLOW Mode
CKS2~CKS0 = 000~110
SLEEP Mode
FHIDEN=0, FSIDEN=0
HALT instruction is executed
IDLE0 Mode
FHIDEN=0, FSIDEN=1
HALT instruction is executed
IDLE1 Mode
FHIDEN=1, FSIDEN=1
HALT instruction is executed
IDLE2 Mode
FHIDEN=1, FSIDEN=0
HALT instruction is executed