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1 port data register (pdr), Port data register (pdr) – FUJITSU F2MCTM-16LX User Manual

Page 186

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CHAPTER 10 I/O PORTS

10.2.1

Port Data Register (PDR)

Note that R/W for I/O ports differ from R/W for memory in the following points:
• Input mode
Read: The level at the corresponding pin is read.
Write: Data is written to an output latch.
• Output mode
Read: The port data register latch value is read.
Write: Data is written to an output latch and outputted to the corresponding pin.
Figure 10.2-2 sho
ws the port data registers (PDR).

Port Data Register (PDR)

Figure 10.2-2 Port Data Registers (PDR)

P27

P26

P25

P24

P23

P22

P21

P20

P44

P43

P42

P41

P40

P54

P53

P52

P51

P50

P67

P66

P65

P64

P63

P62

P61

P60

P87

P86

P85

P84

P83

P82

P80

P57

P56

P55

7

6

5

4

3

2

1

0

7

6

5

4

3

2

1

0

7

6

5

4

3

2

1

0

7

6

5

4

3

2

1

0

7

6

5

4

3

2

1

0

Bit No.

Reset value

Access

Undefined

R/W

Undefined

R/W

Undefined

R/W

Undefined

R/W

Undefined

R/W

Bit No.

Bit No.

Bit No.

Bit No.

PDR2
Address: 000002

H

PDR4
Address: 000004

H

PDR5
Address: 000005

H

PDR6
Address: 000006

H

PDR8
Address: 000008

H