System Start Up Time Characteristics - Holtek BS86DH12C Manual

System Start Up Time Characteristics

Symbol Parameter
System Start-up Time
Wake-up from Condition where f
System Start-up Time
t
SST
Wake-up from Condition where f
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
LVRC/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
High Voltage Touch A/D Flash MCU with HVIO
Test Conditions
V Conditions
DD
— f =f ~f /64, f
SYS H H H
— f =f =f
SYS SUB LXT
is Off
SYS
— f =f =f
SYS SUB LIRC
— f =f ~f /64, f
SYS H H H
is On
— f =f =f or f
SYS
SYS SUB LIRC
— f switches from off → on
HIRC
— f switches from off → on
LXT
— 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 , t
HIRC HIRC SYS
18
BS86DH12C
Min. Typ. Max.
=f — 16 —
HIRC
— 1024 —
— 2 —
=f — 2 —
HIRC
— 2 —
LXT
— 16 —
— 1024 —
30 48 72
10 16 24
45 90 180
=1/f etc.
SYS
time in the table
SST
October 26, 2018
Ta=25°C
Unit
t
HIRC
t
LXT
t
LIRC
t
H
t
SUB
t
HIRC
t
LXT
ms
ms
μs