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7.5 I/O Port Configuration Registers

The I/O mode for each bit of the three ports is

selected by using the Configuration Registers 4,

13 and 15 (See Table 7.1) The structure of these

registers is illustrated in the following tables.

Each bit of the configuration registers determines

the I/O mode of the related port pin.

Table 7.4 Ports A REG_CONF 4

Bit

Name

Value

Description

0D0

Set the pin PA0/T0RES

in Output Mode

Set the pin PA0/T0RES

in Input Mode

1D1

Set the pin PA1/T0OUT

in Output Mode

Set the pin PA1/T0OUT

in Input Mode

2D2

Set the pin PA2/T1OUT

in Output Mode

Set the pin PA2/T1OUT

in Input Mode

3D3

Set the pin PA3/T2OUT

in Output Mode

Set the pin PA3/T2OUT

in Input Mode

4D4

Set the pin PA4/T0STRT

in Output Mode

Set the pin PA4/T0STRT

in Input Mode

5D5

Set the pin PA5/T0CLK

in Output Mode

Set the pin PA5/T0CLK

in Input Mode

6D6

Set the pin PA6 in

Output Mode

Set the pin PA6 in Input

Mode

7D7

Set the pin PB7/PA7/

Ain7 in Output Mode

Set the pin PB7/PA7/

Ain7 in Input Mode

Reset Configuration ‘11111111’

Table 7.5 Ports B REG_CONF 13

Bit

Name

Value

Description

0D0

Set the pin PB0/Ain0

in Output Mode

Set the pin PB0/Ain0

in Input Mode

1D1

Set the pin PB1/Ain1

in Output Mode

Set the pin PB1/Ain1

in Input Mode

2D2

Set the pin PB2/Ain2

in Output Mode

Set the pin PB2/Ain2

in Input Mode

3D3

Set the pin PB3/Ain3

in Output Mode

Set the pin PB3/Ain3

in Input Mode

4D4

Set the pin PB4/Ain4

in Output Mode

Set the pin PB4/Ain4

in Input Mode

5D5

Set the pin PB5/Ain5

in Output Mode

Set the pin PB5/Ain5

in Input Mode

6D6

Set the pin PB6/Ain6

in Output Mode

Set the pin PB6/Ain6

in Input Mode

7D7

Set the pin PB7/PA7/

Ain7 in Output Mode

Set the pin PB7/PA7/

Ain7 in Input Mode

Reset Configuration ‘11111111’

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