HT48xA0-1 HT48xA0-2 Power-on Reset Timing D/NHA0082E Remote

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HT48xA0-1 HT48xA0-2 Power-on Reset Timing D/NHA0082E Remote

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HT48xA0-1 HT48xA0-2 Power-on Reset Timing
HT48xA0-1 HT48xA0-2 Power-on Reset Timing
D/NHA0082E
Remote Type HT48RA0-1/HT48CA0-1 HT48RA0-2/HT48RA0-2 Power-on Reset timing consists three parts depicted Fig-1, namely; Setting Time, Warm-up time System start-up time.
tINTD: Internal delay time oscillator setting time tWU: Crystal/Resonator warm-up time (500µs~5ms), dependent crystal/resonator quality/capacitor oscillator HALT time tSST: System start-up time 1024/fOSC Fig-1
HT48xA0-1 HT48xA0-2 Power-on Reset Timing
When employing PC0/REM Remote Type series, precautions Power-on Reset should taken. PC0/REM configured Carrier Output Level Output through Configuration Option.
HT48xA0-1 HT48xA0-2 (OTP Mask Type MCU), Carrier Output chosen,
during Power-on Reset, PC0/REM remains Level. Level Output chosen, during Power-on Reset period, HT48CA0-1 HT48CA0-2 Mask Type MCU, PC0/REM remains High Level, while HT48RA0-1 HT48RA0-2 Type MCU, PC0/REM remains Level about 80ms changes High Level afterwards. port status during Power-on Reset Period Mask Type under different Configuration Options shown Tabel-1.
Configuration Option Type Mask Type HT48RA0-1, HT48RA0-2 HT48CA0-1, HT48CA0-2 Level High Level Level Level Level Output Carrier output
Table-1
following diagram illustrates detail Power-on Reset timing Mask Type under different Configuration Options:
HT48RA0-1 HT48RA0-2 with Level Output chosen, timing chart shown Fig-2:
illa lity
Fig-2
HT48xA0-1 HT48xA0-2 Power-on Reset Timing
HT48RA0-1 HT48RA0-2 with Carrier Output chosen, timing chart shown
Fig-3
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Fig-3
HT48CA0-1 HT48CA0-2 with Level Output chosen, timing chart shown Fig-4
illa lity
Fig-4
HT48xA0-1 HT48xA0-2 Power-on Reset Timing
HT48CA0-1 HT48CA0-2 with Carrier Output chosen, timing chart shown
Fig-5
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Fig-5
Power-on Reset timing issue users, following application notes helpful:
Carrier Output Configuration Option chosen application, type
transistor recommended switch, turn during Power-on Reset period. application circuit Fig-6.
Carrier Output Option
Fig-6
HT48xA0-1 HT48xA0-2 Power-on Reset Timing
Level Output Configuration Option chosen application both
Mask Type MCU, type transistor recommended switch, turn during Power-on Reset period. Note that Type MCU, PC0/REM will output 80ms period before changes High. During this brief period, transistor will turned Care should taken power consumption issue. application circuit Fig-7.
Level Output Option
Fig-7
HT48xA0-1 HT48xA0-2 Power-on Reset Timing
more than output required, users utilize general purpose
(PA0~PA7, PB0, PB1) connecting type transistor generate signals, Fig-8. During Power-on Reset Period, pins will remain High Level turn transistor therefore Mask Type will have same behavior during Power-on Reset.
Fig-8 notes mentioned above relating Power-on Reset relevant when using Remote Type HT48xA0-1 HT48xA0-2 Remote Control applications.

HT48xA0-1 HT48xA0-2 Power-on Reset Timing D/NHA0082E Remote

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