HT48RA0A 데이터 시트보기 (PDF) - Holtek Semiconductor

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HT48RA0A

8-Bit Remote Type MCU

Holtek Semiconductor 

Application Circuits

HT48RA0A

PB1

PB2

PB0

PB3

PA3

PB4

V DD

PA2

PB5

PA1

PA0

PB6

0 6"&4 ) )

P C 0 /R E M

PB7

C*

R*

PA7

O SC1

X 'ta l

PA6

(s e e N o te )

O SC2

PA5

C*

RES

PA4

Note: It is recommended that a 100mF decoupling capacitor is placed between VSS and VDD.

The resistance and capacitance for reset circuit should be designed to ensure that the VDD is stable and re-

mains in a valid range of the operating voltage before bringing RES to high.

The following table shows the R* and C* value according different crystal values.

Crystal or Resonator

4MHz Crystal

4MHz Resonator (3 pin)

4MHz Resonator (2 pin)

3.58MHz Crystal

3.58MHz Resonator (2 pin)

2MHz Crystal & Resonator (2 pin)

1MHz Crystal

429kHz Resonator

455kHz Resonator

480kHz Resonator

C*

0pF

0pF

10pF

0pF

25pF

25pF

35pF

300pF

300pF

300pF

R*

10kW

12kW

12kW

10kW

10kW

10kW

27kW

10kW

10kW

9.1kW

Rev. 1.70

11

July 16, 2003

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