Pin Assignment

Pin Description

Pad Name

I/O

Options

Description

PA0~PA7

I/O

Pull-high

Wake-up

Bidirectional 8-bit input/output port. Each individual pin on this port can

be configured as a wake-up input by a configuration option. Software in-

structions determine if the pin is a CMOS output or Schmitt Trigger input.

Configuration options determine which pins on the port have pull-high re-

sistors.

PC0, PC5, PC7 I/O

Pull-high

Bidirectional input/output port. Software instructions determine if the pin

is a CMOS output or Schmitt Trigger input. Configuration options deter-

mine which pins on the port have pull-high resistors. When the

multi-function interrupt is enabled an interrupt will be generated when-

ever PC0 or PC5 has a falling edge, or PC7 has a rising edge.When in

the idle mode such an interrupt will wake up the device.

PC1, PC4, PC6 I/O

Pull-high

Bidirectional input/output port. Software instructions determine if the pin

is a CMOS output or Schmitt Trigger input. Configuration options deter-

mine which pins on the port have pull-high resistors.

PC2, PC3

O

¾

NMOS output structures

PD0~PD7

I/O

Pull-high

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

pin is a CMOS output or Schmitt Trigger input. Configuration options de-

termine which nibble on the port have pull-high resistors.

PE0~PE3

I/O

Pull-high

Bidirectional 4-bit input/output port.Software instructions determine if the

pin is a CMOS output or Schmitt Trigger input. Configuration options de-

termine if all the pins on the port have pull-high resistors.

INT

I

¾

External interrupt Schmitt trigger input. Edge trigger activated on high to

low transition. No pull-high resistor.

TMR0

I

¾

Timer/Event Counter 0 Schmitt trigger input . No pull-high resistor.

TMR1

I

¾

Timer/Event Counter 1 Schmitt trigger input . No pull-high resistor.

DTMF

O

¾

Dual Tone Multi Frequency Output

MUSIC

O

¾

CMOS output structure Programmable Frequency Divider pin.

HT95R43/HT95R44

Rev. 1.00

3

March 31, 2010

1

2

3

4

5

6

7

8

9

1 0

1 1

1 2

1 3

2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8

6 0

6 1

6 2

6 3

6 4

2 9 3 0 3 1 3 2

H T 9 5 R 4 3 / H T 9 5 R 4 4

6 4 L Q F P - A

5 2

5 3

5 4

5 5

5 6

5 7

5 8

5 9

C P T E N V

C P T V R E F

C P T S I N

N C

R T / G T

E S T

V D D 2

V S S 2

V P

V N

G S

V R E F

V S S

P D 7

P D 6

P D 5

P A 4

P A 5

P A 6

P A 7

X 2

X 1

X C

V S S

V D D

R E S

D T M F

P C 7

P C 6

P C 5

P C 4

P C 3

1 4

1 5

1 6

4 3

4 4

4 5

4 6

4 7

4 8

3 6

3 7

3 8

3 9

4 0

4 1

4 2

3 3

3 4

3 5

1 7 1 8 1 9

4 9

5 0

5 1