ATAM894 datasheet(30/97 Pages) ATMEL

30 / 97 page

4679D–4BMCU–05/05

ATAM894

6.2.5

Bi-directional Port 6

The bi-directional Port 6 is a bit-wise configurable I/O port and provides the external pins for the

Timer 3. As a normal port, it performs in exactly the same way as bi-directional Port 6 (see Fig-

ure 6-6 on page 29). Two additional multiplexes allow data and port direction control to be

passed over to other internal modules (Timer 3). The I/O pin for the T3I line has an additional

mode to generate a Timer 3-interrupt. All two Port 6 pins can be individually switched by the

P6CR register. Figure 6-6 on page 29 shows the internal interfaces to bi-directional Port 6.

6.2.5.1

Port 6 Data Register (P6DAT)

6.2.5.2

Port 6 Control Register (P6CR)

P6xM2, P6xM1 – Port 6x Interrupt Mode/Direction Code

Table 6-4.

Port 4 Control Register

Auxiliary Address: '4'hex First Write Cycle

Second Write Cycle

Code

3 2 1 0

Function

Code

3 2 1 0

Function

x x 1 1

BP40 in input mode

x x 1 1

BP42 in input mode

x x 1 0

BP40 in output mode

x x 1 0

BP42 in output mode

x x 0 1

BP40 enable alternate function (SC for SSI)

x x 0 x

BP42 enable alternate function (T2O for Timer 2)

x x 0 0

BP40 enable alternate function (falling edge interrupt

input for INT3)

1 1 x x

BP43 in input mode

1 1 x x

BP41 in input mode

1 0 x x

BP43 in output mode

1 0 x x

BP41 in output mode

0 1 x x

BP43 enable alternate function (SD for SSI)

0 1 x x

BP41 enable alternate function (VMI for voltage

monitor input)

0 0 x x

BP43 enable alternate function (falling edge interrupt

input for INT3)

0 0 x x

BP41 enable alternate function (T2I external clock

input for Timer 2)

––

Primary register address: '6'hex

Bit 3Bit 2

Bit 1Bit 0

P6DAT

P6DAT3

P6DAT0

Reset value: 1xx1b

Auxiliary register address: '6'hex

Bit 3Bit 2Bit 1Bit 0

P6CR

P63M2

P63M1

P60M2

P60M0

Reset value: 1111b

Table 6-5.

Port 6 Control Register

Auxiliary Address: ’6’hex

Write Cycle

Code

3 2 1 0

Function

Code

3 2 1 0

Function

x x 1 1

BP60 in input mode

1 1 x x

BP63 in input mode

x x 1 0

BP60 in output mode

1 0 x x

BP63 in output mode

x x 0 x

BP60 enable alternate port function

(T3O for Timer 3)

0 x x x

BP63 enable alternate port function (T3I

for Timer 3)

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