ATAR092-C_14 Datasheet, PDF(25/108 Page) ATMEL Corporation – Up to 7 External/Internal Interrupt Sources

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ATAR092-C_14 Datasheet, PDF (25/108 Pages) ATMEL Corporation – Up to 7 External/Internal Interrupt Sources

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ATAR092-C/ATAR892-C

Figure 5-3. Bi-directional Port 2

I/O Bus

5.2.2.1

I/O Bus

(Data out)

P2DATy

Master reset

I/O Bus

D SQ

P2CRy

(Direction)

Port 2 Data Register (P2DAT)

(1)

(1) Mask options

Switched

pull-up

(1)

VDD

Static

(1) Pull-up

BP2y

VDD

(1)

(1) Static

Pull-down

Switched

pull-down

5.2.2.2

P2DAT

Bit 3

P2DAT3

Bit 2

P2DAT2

Bit 3 = MSB, Bit 0 = LSB

Bit 1

P2DAT1

Bit 0

P2DAT0

Primary register address: '2'hex

Reset value: 1111b

Port 2 Control Register (P2CR)

P2CR

Bit 3

P2CR3

Bit 2

P2CR2

Bit 1

P2CR1

Value 1111b means all pins in input mode

Bit 0

P2CR0

Auxiliary register address: '2'hex

Reset value: 1111b

Table 5-2.

Code

3210

xxx1

xxx0

xx1x

xx0x

x1xx

x0xx

1xxx

0xxx

Port 2 Control Register

Function

BP20 in input mode

BP20 in output mode

BP21 in input mode

BP21 in output mode

BP22 in input mode

BP22 in output mode

BP23 in input mode

BP23 in output mode

4593Dâ4BMCUâ05/06

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