HT46C22 Просмотр технического описания (PDF) - Holtek Semiconductor

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HT46C22

8-Bit A/D Type MCU

Holtek Semiconductor 

Pad Assignment

HT46C22

HT46R22/HT46C22

PA1

1

29 28 27 26 25 24 23 22

PA0

2

P B 3 /A N 3

3

P B 2 /A N 2

4

P B 1 /A N 1

5

P B 0 /A N 0

6

21

P A 6 /S D A

20

P A 7 /S C L

19

O SC2

(0 ,0 )

18

O SC1

7 VSS

8

9

15 V D D

10

11

12 13 14 16 17

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

Pad Description

Pad Name I/O

Options

Description

PB0/AN0

PB1/AN1

PB2/AN2

PB3/AN3

PB4/AN4

PB5/AN5

PB6/AN6

I/O

Pull-high

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

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

mined by pull-high option: 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.

PB7/AN7

PA0~PA2

PA3/PFD

PA4/TMR

PA5/INT

PA6/SDA

PA7/SCL

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 pull-high

PA3 or PFD options: bit option). The PFD, TMR and INT are pin-shared with PA3, PA4

I/O or Serial Bus and PA5, respectively. Once the I2C Bus function is used, the internal regis-

ters related to PA6 and PA7 can not be used.

VSS

¾

¾

Negative power supply, ground.

PC0~PC1 I/O

Pull-high

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

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

mine by pull-high option: port option).

Rev. 1.30

3

June 10, 2003

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