Operating Frequency Characteristic Curves; System Start Up Time Characteristics - Holtek BS83A04C Manual

Operating Frequency Characteristic Curves

System Start Up Time Characteristics

Symbol Parameter
System Start-up Time
Wake-up from condition where f
System Start-up Time
t
Wake-up from condition where f
SST
System Speed Switch Time
FAST to SLOW Mode or
SLOW to FAST Mode
System Reset Delay Time
Reset source from Power-on reset or LVR
hardware reset
t System Reset Delay Time
RSTD
WDTC/RSTC software reset
System Reset Delay Time
Reset source from WDT overflow
t Minimum Software Reset Width to Reset
SRESET
Note: 1. For the System Start-up time values, whether f
f system oscillator. Details are provided in the System Operating Modes section.
SYS
2. The time units, shown by the symbols t
as provided in the frequency tables. For example: t
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 , as provided in the LIRC frequency table, must be added to the t
START
above.
4. The System Speed Switch Time is effectively the time taken for the newly activated oscillator to start up.
Rev. 1.00
4-Key Enhanced Touch I/O Flash MCU
System Operating Frequency
8MHz
1.8V
Operating Voltage
Test Conditions
V
DD
— f =f ~f
SYS H
is off
— f =f
SYS
SYS SUB
— f =f ~f
SYS H
is on
— f =f
SYS
SYS SUB
— f switches from off → on
HIRC
— RR =5V/ms
POR
—
—
—
is on or off depends upon the mode type and the chosen
SYS
, t etc. are the inverse of the corresponding frequency values
HIRC SYS
=1/f
HIRC
12
5.5V
Min. Typ. Max. Unit
Conditions
/64, f =f — 16
H H HIRC
=f — 2
LIRC
/64, f =f — 2
H H HIRC
=f — 2
LIRC
— 16
42 48
—
— 14 16
— 45 90
, t =1/f etc.
HIRC SYS SYS
SST
BS83A04C
Ta=-40°C~85°C
— t
HIRC
— t
LIRC
— t
H
— t
SUB
— t
HIRC
54 ms
18 ms
120 μs
time in the table
March 24, 2020