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AT43USB326 Datasheet(PDF) 44 Page - ATMEL Corporation

Part # AT43USB326
Description  Multimedia USB Keyboard Controller with Embedded Hub
Download  102 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT43USB326 Datasheet(HTML) 44 Page - ATMEL Corporation

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44
AT43USB326
3313D–USB–04/06
Port D
Port D is a 2-bit bi-directional I/O port. Its output buffers can sink or source 2 mA.
Three I/O memory address locations are allocated for the Port D, one each for the Data Regis-
ter - PORTD, $12($32), Data Direction Register (DDRD), $11($31) and the Port D Input Pins
(PIND), $10($30). The Port D Input Pins address is read only, while the Data Register and the
Data Direction Register are read/write.
Port D Data Register – PORTD
Port D Data Direction Register – DDRD
Port D Input Pins Address – PIND
The Port D Input Pins address (PIND) is not a register, and this address enables access to the
physical value on each Port D pin. When reading PORTD, the Port D Data Latch is read, and
when reading PIND, the logical values present on the pins are read.
Bit
7
6
5
4
3
2
1
0
$12 ($32)
–
–
–
–
–
–
PORTD1
PORTD0
PORTD
Read/Write
R
R
R
R
R
R
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
Bit
7
654
3
2
1
0
$11 ($31)
–
–
–
–
–
–
DDD1
DDD0
DDRD
Read/Write
R
R
R
R
R
R
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
Bit
7
6
5
4
3
2
1
0
$10 ($30)
–
–
–
–
–
–
PIND1
PIND0
PIND
Read/Write
R
R
R
R
R
R
R
R
Initial Value
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A


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