HT46R4A
A.C. Characteristics
Ta=25°C
Test Conditions
Conditions
2.2V~5.5V
Symbol
Parameter
Min.
Typ.
Max.
Unit
VDD
¾
400
400
0
4000
8000
4000
8000
180
kHz
kHz
kHz
kHz
¾
¾
¾
¾
90
65
¾
fSYS
System Clock
3.3V~5.5V
¾
2.2V~5.5V
¾
fTIMER
Timer I/P Frequency (TMR)
3.3V~5.5V
0
¾
3V
5V
¾
45
32
215
¾
¾
¾
ms
ms
tWDTOSC
Watchdog Oscillator Period
130
Watchdog Time-out Period (RC)
216
tWDT1
tWDT2
tWDTOSC
Watchdog Time-out Period
(System Clock)
217
218
tSYS
¾
¾
¾
tRES
tSST
tLVR
tINT
External Reset Low Pulse Width
System Start-up Timer Period
Low Voltage Reset Time
Interrupt Pulse Width
1
¾
0.25
1
¾
¾
¾
¾
¾
¾
¾
¾
¾
1024
1
¾
¾
2
ms
*tSYS
Wake-up from HALT
ms
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
ms
ms
tAD
A/D Clock Period
1
¾
tADC
tADCS
tAD2
tAD2
A/D Conversion Time
76
¾
¾
A/D Sampling Time
32
Note: *tSYS=1/fSYS
Rev. 1.00
5
November 28, 2007
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
