||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||

|||||||||||||||||

2016-01-0026

PT0561-2

02/15/16

8

PI4IOE5V9535

16-bit I

This register is a read-only port. It reflects the incoming logic levels of the pins, regardless of whether the pin is defined as an

input or an output by Register 3. Writes to this register have no effect.

The default value ‘X’ is determined by the externally applied logic level.

Table 5: Input port 0 register

Bit

7

6

5

4

3

2

1

0

Symbol

I0.7

I0.6

I0.5

I0.4

I0.3

I0.2

I0.1

I0.0

Default

X

X

X

X

X

X

X

X

Table 6: Input port 1 register

Bit

7

6

5

4

3

2

1

0

Symbol

I1.7

I1.6

I1.5

I1.4

I1.3

I1.2

I1.1

I1.0

Default

X

X

X

X

X

X

X

X

iii.

Register 2 and 3:Output port registers

This register is an output-only port. It reflects the outgoing logic levels of the pins defined as outputs by Registers 6 and 7. Bit

values in this register have no effect on pins defined as inputs. In turn, reads from this register reflect the value that is in the flip-

flop controlling the output selection, not the actual pin value.

Table 7: Output port 0 register

Bit

7

6

5

4

3

2

1

0

Symbol

O0.7

O0.6

O0.5

O0.4

O0.3

O0.2

O0.1

O0.0

Default

1

1

1

1

1

1

1

1

Table 8: Output port 1 register

Bit

7

6

5

4

3

2

1

0

Symbol

O1.7

O1.6

O1.5

O1.4

O1.3

O1.2

O1.1

O1.0

Default

1

1

1

1

1

1

1

1

iv.

Register 4 and 5: Polarity inversion registers

This register allows the user to invert the polarity of the Input port register data. If a bit in this register is set (written with ‘1’),

the Input port data polarity is inverted. If a bit in this register is cleared (written with a ‘0’), the Input port data polarity is retained.

Table 9: Polarity Inversion port 0 register

Bit

7

6

5

4

3

2

1

0

Symbol

N0.7

N0.6

N0.5

N0.4

N0.3

N0.2

N0.1

N0.0

Default

0

0

0

0

0

0

0

0