HT46RB50 datasheet(3/53 Pages) HOLTEK

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Pin Assignment

Pin Description

Pin Name

I/O

Options

Description

PA0~PA7

I/O

Pull-high

(bit option)

Wake-up

(bit option)

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 controlled

by PAC (PA control register, bit option). Pull-high resistor options:

PA0~PA7, bit option, wake-up options: PA0~PA7.

PB0/AN0~

PB7/AN7

I/O

Pull-high

(bit option)

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: bit option). The PB can be used as analog input of the ana-

log to digital converter.

PC0/INT

PC1/TMR0

PC2/TMR1

PC3~PC7

I/O

Pull-high

(nibble option)

Bidirectional I/O lines. Software instructions determine the CMOS output or

Schmitt trigger input with pull-high resistor (determined by pull-high options:

nibble option). The PC0, PC1 PC2 are pin-shared with INT, TMR0 or TMR1,

respectively.

PD0/PWM0~

PD1/PWM1

PD2~PD7

I/O

Pull-high

(nibble option)

I/O or PWM

Bidirectional I/O lines. Software instructions determine the CMOS output or

Schmitt trigger input with pull-high resistor (determined by pull-high options:

nibble option). The PD0/PD1 are pin-shared with PWM0/PWM1 (dependent

on PWM options).

PE0/SCS

I/O

Pull-high

(nibble option)

Bidirectional I/O lines. Software instructions determine the CMOS output or

Schmitt trigger input with pull-high resistor (determined by pull-high options:

nibble option). The PE0 is pin-shared with SCS. SCS is a chip select pin of

the Serial interface, Master mode is output, Slave mode is input.

PE1/CLK

I/O

Pull-high

(nibble option)

Bidirectional I/O lines. Software instructions determine the CMOS output or

Schmitt trigger input with pull-high resistor (determined by pull-high options:

nibble option). The PE1 is pin-shared with CLK. CLK is a Serial interface se-

rial clock input/output (Initial is input).

HT46RB50

Rev. 1.20

November 1, 2006

P A 3

P A 2

P A 1

P A 0

P D 1 / P W M 1

P D 0 / P W M 0

P B 5 / A N 5

P B 4 / A N 4

P B 3 / A N 3

P B 2 / A N 2

P B 1 / A N 1

P B 0 / A N 0

P E 3 / S D O

P E 2 / S D I

P A 4

P A 5

P A 6

P A 7

R E S

V D D / A V D D

V S S / A V S S

O S C 1

O S C 2

V 3 3 O

U D P

U D N

P C 0 / I N T

P E 1 / C L K

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 4 6 R B 5 0

4 8 S S O P - A

P A 3

P A 2

P A 1

P A 0

P D 3

P D 2

P D 1 / P W M 1

P D 0 / P W M 0

P B 7 / A N 7

P B 6 / A N 6

P B 5 / A N 5

P B 4 / A N 4

P C 7

P C 6

P C 5

P C 4

P B 3 / A N 3

P B 2 / A N 2

P B 1 / A N 1

P B 0 / A N 0

P E 3 / S D O

P E 2 / S D I

P E 1 / C L K

P E 0 / S C S

P A 4

P A 5

P A 6

P A 7

P D 4

P D 5

P D 6

P D 7

R E S

A V D D

V D D

A V S S

V S S

O S C 1

O S C 2

P E 4

P E 5

V 3 3 O

U D P

U D N

P C 0 / I N T

P C 1 / T M R 0

P C 2 / T M R 1

P C 3

H T 4 6 R B 5 0

2 8 S O P - A / S K D I 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 0

1 1

1 2

1 3

1 4

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