HT46C23 데이터 시트보기 (PDF) - Holtek Semiconductor

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HT46C23

A/D Type 8-Bit MCU

Holtek Semiconductor 

Pad Assignment

HT46C23

HT46R23/HT46C23

33 32 31 30 29 28 27 26 25 24

PA0

1

P B 3 /A N 3

2

P B 2 /A N 2

3

P B 1 /A N 1

4

P B 0 /A N 0

5

(0 , 0 )

VSS

6 8 9 10 11 12 13 14 15

VSS

7

23

P A 7 /S C L

22

O SC2

21

20

19

18

17

16

O SC1

VDD

VDD

TEST3

TEST2

TEST1

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

Pad Description

Pad Name

PA0~PA2

PA3/PFD

PA4/TMR

PA5/INT

PA6/SDA

PA7/SCL

PB0/AN0

PB1/AN1

PB2/AN2

PB3/AN3

PB4/AN4

PB5/AN5

PB6/AN6

PB7/AN7

PC0~PC4

I/O

Option

Description

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

Pull-high input by options. Software instructions determine the CMOS output or

I/O

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

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

I/O or Serial Bus PA3, PA4 and PA5, respectively. Once the I2C Bus function is used, the in-

ternal registers related to PA6 and PA7 can not be used.

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

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

I/O

Pull-high mined by pull-high: port option) or A/D input.

Once a PB line is selected as an A/D input (by using software control), the

I/O function and pull-high resistor are disabled automatically.

Bidirectional 5-bit input/output port. Software instructions determine the

I/O

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

mine by pull-high option: port option).

Rev. 1.60

3

May 3, 2004

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