ATAM894 datasheet(26/97 Pages) ATMEL

26 / 97 page

4679D–4BMCU–05/05

ATAM894

Figure 6-3.

Bi-directional Port 2

6.2.2.1

Port 2 Data Register (P2DAT)

Note:

* Bit 3 = MSB, Bit 0 = LSB

6.2.2.2

Port 2 Control Register (P2CR)

Note:

Value 1111b means all pins in input mode

Master reset

BP2y

(1) Flash options

P2DATy

P2CRy

I/O Bus

Switched

pull-up

Static

Pull-up

(Data out)

(Direction)

(1)

Static

Pull-down

Switched

pull-down

(1)

Primary register address: '2'hex

Bit 3*

Bit 2

Bit 1

Bit 0

P2DAT

P2DAT3

P2DAT2

P2DAT1

P2DAT0

Reset value: 1111b

Auxiliary register address: '2'hex

Bit 3

Bit 2

Bit 1

Bit 0

P2CR

P2CR3

P2CR2

P2CR1

P2CR0

Reset value: 1111b

Table 6-2.

Port 2 Control Register

Code

3 2 1 0

Function

x x x 1

BP20 in input mode

x x x 0

BP20 in output mode

x x 1 x

BP21 in input mode

x x 0 x

BP21 in output mode

x 1 x x

BP22 in input mode

x 0 x x

BP22 in output mode

1 x x x

BP23 in input mode

0 x x x

BP23 in output mode

ATAM894 Datasheet(PDF) 26 Page - ATMEL Corporation

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