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HT56C668 Datasheet(PDF) 11 Page - Holtek Semiconductor Inc |
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HT56C668 Datasheet(HTML) 11 Page - Holtek Semiconductor Inc |
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11 / 104 page  Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions IOL1 I/O Port Sink Current (PA, PB, PD; SEG, COM Level or LED Output) 3V VOL=0.1VDD 612 ¾ mA 5V 10 25 ¾ mA IOH1 I/O Port Source Current (PA, PB, PD; SEG, COM Level or LED Output) 3V VOH=0.9VDD -2 -4 ¾ mA 5V -5 -8 ¾ mA IOL2 LCD Common and Segment Current 3V VOL=0.1VDD 210 420 ¾mA 5V 350 700 ¾mA IOH2 LCD Common and Segment Current 3V VOH=0.9VDD -80 -160 ¾mA 5V -180 -360 ¾mA RPH Pull-high Resistance for I/O Ports 3V ¾ 20 60 100 k W 5V ¾ 10 30 50 k W Note: 1. 32768Hz is slow start mode (RTCC.4=1) in D.C. current measurement. 2. LCD waveform is in Type A condition. 3. fS is internal clock for Buzzer, RTC, Time base and WDT. 4. Timer0/1 off. Timer filter disable in all test condition. 5. All peripherals are in OFF condition if not mentioned at IDD,ISTB tests. A.C. Characteristics Ta=25 °C Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions fSYS System Clock (Crystal OSC, RC OSC) ¾ 2.2V~5.5V 100 ¾ 4000 kHz 3.0V~5.5V 100 ¾ 8000 kHz 4.5V~5.5V 100 ¾ 12000 kHz fRTCOSC RTC Frequency ¾¾ ¾ 32768 ¾ Hz fTIMER Timer I/P Frequency (TMR0/TMR1) ¾ 2.2V~5.5V 0 ¾ 4000 kHz 3.0V~5.5V 0 ¾ 8000 kHz 4.5V~5.5V 0 ¾ 12000 kHz fRC32K 32K RC Oscillator ¾ 2.2V~5.5V, After Trim 28.8 32.0 35.2 kHz tRES External Reset Low Pulse Width ¾¾ 1 ¾¾ ms tLVR Low Voltage Reset Time ¾¾ 0.1 0.4 0.6 ms tSST1 System Start-up Timer Period ¾ Power-on ¾ 1024 ¾ tSYS* tSST2 System Start-up Timer Period for XTAL or RTC oscillator ¾ Wake-up from Power Down Mode ¾ 1024 ¾ tSYS* tSST3 System Start-up Timer Period for External RC or External Clock ¾ Wake-up from Power Down Mode ¾ 12 tSYS* tINT Interrupt Pulse Width ¾¾ 1 ¾¾ ms Note: *tSYS=1/fSYS HT56R67/HT56R668/HT56C668/HT56R678/HT56C678/HT56R688 Rev. 1.20 11 March 4, 2010 |
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