HT48R30A datasheet(22/43 Pages) HOLTEK

22 / 43 page

Application Circuits

HT48R30A-1

Rev. 1.10

July 2, 2001

V DD

470 pF

NM O S

ope n d r a i n

0. 1 m F

100 k W

0. 1 m F

HT 4 8 R3 0 A - 1

V DD

0. 1 m F

100 k W

0. 1 m F

51k W ~

1M W

HT 4 8 R3 0 A - 1

VD D

OS C 1

OS C 2

RE S

VS S

IN T / P G 0

PA 0 ~ P A 7

PB 2 ~ P B 7

PC 1 ~ PC 5

PB 0 / BZ

PB 1 / BZ

PC 0 / T M R

VD D

OS C 1

OS C 2

RE S

VS S

IN T / P G 0

PA 0 ~ P A 7

PB 2 ~ P B 7

PC 1 ~ PC 5

PB 0 / BZ

PB 1 / BZ

PC 0 / T M R

RC oscillator for multiple I/O applications

Crystal or ceramic resonator for multiple I/O

applications

Internal RC oscillator for multiple I/O

applications

Internal RC oscillator with RTC for multiple I/O

applications

HT 4 8 R3 0 A - 1

V DD

0. 1 m F

100 k W

0. 1 m F

HT 4 8 R3 0 A - 1

V DD

0. 1 m F

100 k W

0. 1 m F

3276 8H z

VD D

OS C 1 / P G1

OS C 2 / P G2

RE S

VS S

IN T / P G 0

PA 0 ~ P A 7

PB 2 ~ P B 7

PC 1 ~ PC 5

PB 0 / BZ

PB 1 / BZ

PC 0 / T M R

VD D

OS C 1

OS C 2

RE S

VS S

IN T / P G 0

PA 0 ~ P A 7

PB 2 ~ P B 7

PC 1 ~ PC 5

PB 0 / BZ

PB 1 / BZ

PC 0 / T M R

Note: C1=C2=300pF if fSYS<1MHz

Otherwise, C1=C2=0

Note: The resistance and capacitance for reset circuit should be designed in such a way as to ensure

that the VDD is stable and remains within a valid operating voltage range before bringing

RES to high.

HT48R30A Scheda tecnica(PDF) 22 Page - Holtek Semiconductor Inc

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