HT82K94A datasheet(3/43 Pages) HOLTEK

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Pin Assignment

Pin Description

Pin Name

I/O

ROM Code

Option

Description

PA0~PA6

PA7/TMR1

I/O

Pull-high

Wake-up

CMOS/NMOS/PMOS

Bidirectional 8-bit input/output port. Each bit can be configured as a

wake-up input by ROM code option. The input or output mode is con-

trolled by PAC (PA control register).

Pull-high resistor options: PA0~PA7

CMOS/NMOS/PMOS options: PA0~PA7

Wake-up options: PA0~PA7

PA7 is pin-shared with TMR1 input, respectively.

PB0~PB7

I/O

Pull-high

Wake-up

Bidirectional 8-bit input/output port. Software instructions determine the

CMOS output or Schmitt trigger input with pull-high resistor (determined

by pull-high options).

Wake-up options: PB0~PB7

PC0~PC7

I/O

Pull-high

Wake-up

Bidirectional I/O lines. Software instructions determine the CMOS out-

put or Schmitt trigger input with pull-high resistor (determined by

pull-high options).

Wake-up options: PC0~PC7

PD0~PD3

PD4/TMR0

PD5~PD7

I/O

Pull-high

Wake-up

Bidirectional I/O lines. Software instructions determine the CMOS out-

put or Schmitt trigger input with pull-high resistor (determined by

pull-high options).

Wake-up options: PD0~PD7

PD4 is pin-shared with TMR0 input.

PE0~PE7

I/O

Pull-high

Wake-up

Bidirectional I/O lines. Software instructions determine the CMOS out-

put or Schmitt trigger input with pull-high resistor (determined by

pull-high options).

Wake-up options: PE0~PE7

HT82K94E/HT82K94A

Rev. 1.50

October 11, 2007

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

H T 8 2 K 9 4 E / H T 8 2 K 9 4 A

4 8 S S O P - A

P C 6

P C 7

P A 4

P A 5

P A 6

P A 7 / T M R 1

P E 7

P E 6

P E 5

P E 4

P D 3

P D 2

P D 1

P D 0

O S C 1

O S C 2

R E S

V S S

P B 7

P B 6

P B 5

P B 4

P B 3

P B 2

P C 5

P C 4

P A 3

P A 2

P A 1

P A 0

P C 0

P C 1

P C 2

P C 3

P E 0

P E 1

P E 2

P E 3

P D 4 / T M R 0

P D 5

P D 6

P D 7

V D D

V 3 3 O

U S B D + / C L K

U S B D - / D A T A

P B 0

P B 1

HT82K94A Datasheet(PDF) 3 Page - Holtek Semiconductor Inc

HT82K94A Datasheet(HTML) 3 Page - Holtek Semiconductor Inc

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