Rev. 1.00
12
August 29, 2018
Rev. 1.00
13
August 29, 2018
HT45F6530
AC Voltage Regulator Flash MCU
HT45F6530
AC Voltage Regulator Flash MCU
Low Speed Internal Oscillator Characteristics – LIRC
Ta=25˚C, unless otherwise specified
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
Temp.
f
LIRC
LIRC Frequency
5V
25˚C
25.6
32.0
38.4
kHz
2.2V~5.5V
25˚C
12.8
32.0
41.6
-40˚C~85˚C
8
32
60
t
START
LIRC Start Up Time
—
—
—
—
100
μs
System Start Up Time Characteristics
Ta=-40˚C~85˚C
Symbol
Parameter
Test Conditions
Min. Typ. Max.
Unit
V
DD
Conditions
t
SST
System Start-up Time
Wake-up from condition where f
SYS
is off
— f
SYS
=f
H
~f
H
/64, f
H
=f
HIRC
—
16
—
t
HIRC
— f
SYS
=f
SUB
=f
LIRC
—
2
—
t
LIRC
System Start-up Time
Wake-up from condition where f
SYS
is on
— f
SYS
=f
H
~f
H
/64, f
H
=f
HIRC
—
2
—
t
H
— f
SYS
=f
SUB
=f
LIRC
—
2
—
t
SUB
System Speed Switch Time
FAST to SLOW Mode or
SLOW to FAST Mode
— f
HIRC
switches from off
→
on
—
16
—
t
HIRC
t
RSTD
System Reset Delay Time
Reset source from Power-on reset or
LVR hardware reset
— RR
POR
=5V/ms
25
50
150
ms
System Reset Delay Time
WDTC software reset
—
—
System Reset Delay Time
Reset source from WDT overflow
—
—
8.3
16.7 50.0
ms
t
SRESET
Minimum Software Reset Width to Reset —
—
45
90
375
μs
Note: 1. For the System Start-up time values, whether f
SYS
is on or off depends upon the mode type and the chosen f
SYS
system oscillator. Details are provided in the System Operating Modes section.
2. The time units, shown by the symbols t
HIRC
, t
SYS
etc. are the inverse of the corresponding frequency values as
provided in the frequency tables. For example t
HIRC
=1/f
HIRC
, t
SYS
=1/f
SYS
etc.
3. If the LIRC is used as the system clock and if it is off when in the SLEEP Mode, then an additional LIRC start
up time, t
START
, as provided in the LIRC frequency table, must be added to the t
SST
time in the table above.
4. The System Speed Switch Time is effectively the time taken for the newly activated oscillator to start up.