SN8P2740 Series
ADC, OP-amp, Comparator 8-Bit Micro-Controller
4.7 SYSTEM CLOCK TIMING
Parameter
Symbol
Description
Typical
Hardware configuration time
Tcfg
2048*FILRC
64ms @ FILRC = 32KHz
128ms @ FILRC = 16KHz
Oscillator start up time
Tost
The start-up time is depended on oscillator‟s material,
factory and architecture. Normally, the low-speed
oscillator‟s start-up time is lower than high-speed
oscillator. The RC type oscillator‟s start-up time is faster
than crystal type oscillator.
-
Oscillator warm-up time
Tosp
Oscillator warm-up time of reset condition.
2048*Fhosc
(Power on reset, LVD reset, watchdog reset, external
reset pin active.)
64ms @ Fhosc = 32KHz
512us @ Fhosc = 4MHz
128us @ Fhosc = 16MHz
Oscillator warm-up time of power down mode wake-up
condition.
2048*Fhosc ……Crystal/resonator type oscillator, e.g.
32768Hz crystal, 4MHz crystal, 16MHz crystal…
32*Fhosc……RC type oscillator, e.g. external RC type
oscillator, internal high-speed RC type oscillator.
X‟tal:
64ms @ Fhosc = 32KHz
512us @ Fhosc = 4MHz
128us @ Fhosc = 16MHz
RC:
8us @ Fhosc = 4MHz
2us @ Fhosc = 16MHz
Power On Reset Timing
Vdd
Vp
Power On Reset
Flag
Oscillator
Tcfg
Tost
Tosp
Fcpu
(Instruction Cycle)
External Reset Pin Reset Timing
Reset pin falling edge trigger system reset.
External Reset Pin
Reset pin returns to high status.
External Reset
Flag
Oscillator
Tcfg
Tost
Tosp
Fcpu
(Instruction Cycle)
System is under reset
status.
SONiX TECHNOLOGY CO., LTD
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Version 2.0
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