HT46C24 datasheet(3/49 Pages) HOLTEK

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Pad Assignment

HT46C24

* The IC substrate should be connected to VSS in the PCB layout artwork.

Pin Description

Pin Name

I/O

Options

Description

PA0~PA2

PA3/PFD

PA4

PA5/INT

PA6/SDA

PA7/SCL

I/O

Pull-high

Wake-up

PA3 or PFD

I/O or Serial

Bus

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

input by option (bit option). Software instructions determine the CMOS out-

put or Schmitt trigger input with or without pull-high resistor (determined by

pull-high options: bit option). The PFD and INT are pin-shared with PA3

and PA5, respectively. Once the I

2C Bus function is used, the internal reg-

isters related to PA6 and PA7 cannot be used.

PB0/AN0

PB1/AN1

PB2/AN2

PB3/AN3

PB4/AN4

PB5/AN5

PB6/AN6

PB7/AN7

I/O

Pull-high

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

CMOS output, Schmitt trigger input with or without pull-high resistor (deter-

mined by pull-high option: bit option) or A/D input. Once a PB line is se-

lected as an A/D input (by using software control), the I/O function and

pull-high resistor are automatically disabled.

HT46R24/HT46C24

Rev. 1.50

May 3, 2004

( 0 , 0 )

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

3 7

3 6

3 5

3 4

3 3

3 2

3 1

3 0

2 9

2 8

2 7

4 1

4 0

3 9

3 8

4 2

4 3

4 4

4 5

4 6

4 7

4 8

4 9

5 0

5 1

5 2

5 3

5 4

P D 3 / P W M 3

T M R 1

R E S

P D 2 / P W M 2

V C C

O S C 2

O S C 1

P F 6

P F 7

P F 5

P B 1 / A N 1

P B 2 / A N 2

P B 3 / A N 3

P B 0 / A N 0

P F 1

P F 2

P F 3

P D 7

P D 4

P D 5

P D 6

G N D

HT46C24 数据表(PDF) 3 Page - Holtek Semiconductor Inc

HT46C24 数据表(HTML) 3 Page - Holtek Semiconductor Inc

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