HT56R22 View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT56R22' PDF : 134 Pages View PDF
HT56R22/HT56R23/HT56R24/HT56R25/HT56R26
A.C. Characteristics
Ta=25°C
Symbol
Parameter
fSYS
System Clock
(Crystal OSC, RC OSC)
Test Conditions
VDD
Conditions
2.2V~5.5V
¾ 3.0V~5.5V
4.5V~5.5V
Min. Typ. Max. Unit
32
¾ 4000 kHz
32
¾ 8000 kHz
32
¾ 12000 kHz
5V R=150kW, Ta=25°C* -2%
4
+2% MHz
f4MERC System clock (ERC)
5V R=150kW,
Ta=-40°C~+85°C
-8%
4
+8% MHz
2.7V~ R=150kW,
5.5V Ta=-40°C~+85°C
-15% 4 +15% MHz
5V Ta=25°C
-2%
4
+2% MHz
f4MIRC
System clock (HIRC)
5V Ta=-40°C~85°C
2.7V~
5.5V
Ta=-40°C~85°C
-5%
4
+5% MHz
-10% 4 +10% MHz
fLXT
System clock LXT
¾
¾
¾ 32768 ¾
Hz
fTIMER
Timer I/P Frequency
(TMR0/TMR1)
2.2V~5.5V
¾ 3.0V~5.5V
4.5V~5.5V
0
¾ 4000 kHz
0
¾ 8000 kHz
0
¾ 12000 kHz
fLIRC
LIRC Oscillator
¾
2.2V~5.5V,
After Trim
28.8 32.0 35.2 kHz
tRES
External Reset Low Pulse Width ¾
¾
1
¾
¾
ms
tLVR
Low Voltage Reset Time
¾
¾
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
1
2
tSYS
tINT
Interrupt Pulse Width
¾
¾
1
¾
¾
ms
Note:
1. tSYS=1/fSYS1 or 1/fSYS2
2. * For f4MERC, as the resistor tolerance will influence the frequency a precision resistor is recommended.
3. To maintain the accuracy of the internal HIRC oscillator frequency, a 0.1mF decoupling capacitor should
be connected between VDD and VSS and located as close to the device as possible.
Rev. 1.30
15
December 26, 2014
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