HT45R35_10 datasheet(3/59 Pages) HOLTEK

Part #	HT45R35

Description	C/R to F Type 8-Bit OTP MCU

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Manufacturer	HOLTEK [Holtek Semiconductor Inc]

Direct Link	http://www.holtek.com

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3 / 59 page

Pin Assignment

Pin Description

Pin Name

I/O

Options

Description

PA0/INT0/RC1

PA1/INT1/RC2

PA2/TMR/RC3

PA3/RC4

PA4/RC9

PA5/RC10

PA6/RC11

PA7/RC12

I/O

Pull-high*

Wake-up

Bidirectional 8-bit I/O port. Each pin can be configured as a wake-up input

via configuration options. Software instructions determine if the pin is a

CMOS output or Schmitt trigger input. Pull-high resistors can be added to

the each pin via a configuration option.

Pins PA0 and PA1 are pin-shared with external interrupt input pins INT0

and INT1, respectively. Configuration options determine the interrupt en-

able/disable and the interrupt low/high trigger type. Pins PA2 is

pin-shared with the external timer input pins TMR.

Each Pin of PA0~PA3 and PA4~PA7 are pin-shared with RC1~RC4 and

RC9~RC12 respectively via configuration options.

RC1~RC4 and RC9~RC12 are capacitor or resistor connection pins.

PB0~PB7

I/O

Pull-high*

Bidirectional 8-bit I/O port. Software instructions determine if the pin is a

CMOS output or Schmitt trigger input. Pull-high resistors can be added to

the each pin via a configuration option.

RC5~RC8

I

¾

Capacitor or resistor connection pins

RCOUT

I

¾

Capacitor or resistor connection pin to RC OSC

IN

I

¾

Oscillation input pin

RREF

O

¾

Reference resistor connection pin

CREF

O

¾

Reference capacitor connection pin

HT45R35

Rev. 1.30

3

May 14, 2010

H T 4 5 R 3 5

2 0 D I P - B / S O P - B

2 0

1 9

1 8

1 7

1 6

1 5

1 4

1 3

1 2

1 1

1

2

3

4

5

6

7

8

9

1 0

H T 4 5 R 3 5

1 6 D I P - A / N S O P - A

1 6

1 5

1 4

1 3

1 2

1 1

1 0

9

1

2

3

4

5

6

7

8

V S S

C R E F

R R E F

R C O U T / I N

P A 0 / I N T 0 / R C 1

P A 1 / I N T 1 / R C 2

P A 2 / T M R 0 / R C 3

P A 3 / T M R 1 / R C 4

O S C 2

O S C 1

V D D

R E S

P A 7 / R C 1 2

P A 6 / R C 1 1

P A 5 / R C 1 0

P A 4 / R C 9

2 4

2 3

2 2

2 1

2 0

1 9

1 8

1 7

1 6

1 5

1 4

1 3

1

2

3

4

5

6

7

8

9

1 0

1 1

1 2

H T 4 5 R 3 5

2 4 S K D I P - B / S O P - B / S S O P - B

P B 3

P B 2

P B 1

P B 0

V S S

C R E F

R R E F

R C O U T / I N

P A 0 / I N T 0 / R C 1

P A 1 / I N T 1 / R C 2

P A 2 / T M R 0 / R C 3

P A 3 / T M R 1 / R C 4

P B 4

P B 5

P B 6

P B 7

O S C 2

O S C 1

V D D

R E S

P A 7 / R C 1 2

P A 6 / R C 1 1

P A 5 / R C 1 0

P A 4 / R C 9

H T 4 5 R 3 5

2 8 S K D I P - A / S O P - A / S S O P - A

2 8

2 7

2 6

2 5

2 4

2 3

2 2

2 1

2 0

1 9

1 8

1 7

1 6

1 5

1

2

3

4

5

6

7

8

9

1 0

1 1

1 2

1 3

1 4

P B 3

P B 2

P B 1

P B 0

V S S

C R E F

R R E F

R C O U T / I N

P A 0 / I N T 0 / R C 1

P A 1 / I N T 1 / R C 2

P A 2 / T M R 0 / R C 3

P A 3 / T M R 1 / R C 4

R C 5

R C 6

P B 4

P B 5

P B 6

P B 7

O S C 2

O S C 1

V D D

R E S

P A 7 / R C 1 2

P A 6 / R C 1 1

P A 5 / R C 1 0

P A 4 / R C 9

R C 8

R C 7

P A 3 / P B 3 / T M R 1 / R C 4

P A 2 / P B 2 / T M R 0 / R C 3

P B 1

P B 0

V S S

C R E F

R R E F

R C O U T / I N

P A 0 / I N T 0 / R C 1

P A 1 / I N T 1 / R C 2

P A 4 / P B 4 / R C 9

P A 5 / P B 5 / R C 1 0

P B 6

P B 7

O S C 2

O S C 1

V D D

R E S

P A 7 / R C 1 2

P A 6 / R C 1 1

H T 4 5 R 3 5

3 2 Q F N - A

1

2

3

4

5

6

7

8

9 1 0 1 1 1 2 1 3 1 4 1 5 1 6

1 7

1 8

1 9

2 0

2 1

2 2

2 3

2 4

2 5

2 6

2 7

2 8

2 9

3 0

3 1

3 2

P B 0

N C

V S S

C R E F

R R E F

R C O U T / I N

P A 0 / I N T 0 / R C 1

P A 1 / I N T 1 / R C 2

N C

O S C 1

V D D

R E S

P A 7 / R C 1 2

P A 6 / R C 1 1

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HT45R35 Datasheet(PDF) 3 Page - Holtek Semiconductor Inc

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