HT46R71D datasheet(3/46 Pages) HOLTEK

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Pin Assignment

Pin Description

Pin Name

I/O

Options

Description

PA0/BZ

PA1/BZ

PA2

PA3

PA4/TMR0

PA5/TMR1

PA6/INT

PA7

I/O

Wake-up

Pull-high

Buzzer

Bidirectional 8-bit input/output port. Each individual bit on this port can

be configured to have a wake-up function using a configuration option.

Software instructions determine the CMOS output or Schmitt trigger in-

put. Configuration options determine which pin on this port has

pull-high resistors. The BZ, BZ, TMR0, TMR1 and INT are pin-shared

with PA0, PA1, PA4, PA5 and PA6 respectively.

PB0~PB1

I/O

Pull-high

Bidirectional 2-bit input/output port. Software instructions determine if

the pin is a CMOS output or Schmitt trigger input. Configuration op-

tions determine which pin on this port have pull-high resistors.

VLCD

LCD power supply

COM0~COM2

1/2or1/3 Duty

COM0~COM2 are the common outputs for the LCD panel plate.

SEG0~SEG9

Segment

Output

LCD driver outputs for the LCD panel segments.

VOBGP

Bandgap voltage output pin. (for external use)

VOREG

Regulator output 3.3V

VOCHP

Charge pump output (a capacitor is required to be connected)

CHPC1

¾¾

Charge pump capacitor, positive

CHPC2

¾¾

Charge pump capacitor, negative

HT46R71D

Rev. 1.00

January 9, 2006

H T 4 6 R 7 1 D

4 8 S S O P - A

P A 0 / B Z

P A 1 / B Z

P A 2

P A 3

P A 4 / T M R 0

P A 5 / T M R 1

P A 6 / I N T

P A 7

V S S

V O B G P

C H P C 2

C H P C 1

V O C H P

V O R E G

A V S S

N C

D O P A P

D O P A N

D O P A O

D C H O P

D S R R

D S R C

R E S

O S C 1

O S C 2

V D D

N C

S E G 0

S E G 1

S E G 2

S E G 3

S E G 4

S E G 5

S E G 6

S E G 7

S E G 8

S E G 9

C O M 2

C O M 1

C O M 0

V L C D

P B 1

P B 0

N C

D S C C

4 8

4 7

4 6

4 5

4 4

4 3

4 2

4 1

4 0

3 9

3 8

3 7

3 6

3 5

3 4

3 3

3 2

3 1

3 0

2 9

2 8

2 7

2 6

2 5

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

HT46R71D Datasheet(PDF) 3 Page - Holtek Semiconductor Inc

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