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參數(shù)資料
| 型號： | AT43USB326-AU |
| 廠商： | Atmel Corp. |
| 英文描述： | Multimedia USB Keyboard Controller with Embedded Hub |
| 中文描述： | 多媒體USB鍵盤控制器的嵌入式集線器 |
| 文件頁數(shù)： | 45/102頁 |
| 文件大小： | 511K |
| 代理商： | AT43USB326-AU |
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45
AT43USB326
3313D–USB–04/06
Port E
Port E[0,1] are bi-directional I/O ports with open drain outputs and controlled slew rate and are
designed for use as the column drivers in a keyboard controller. The Port E[0,1] output buffers
can sink 4 mA. Port E[4:7] are bi-directional I/O with open drain outputs capable of driving
LEDs directly. Each pin of Port E[4:7] has a series resistor to limit the LEDs current.
Three I/O memory address locations are allocated for the Port E, one each for the Data Regis-
ter – PORTE, $03($23), Data Direction Register – DDRE, $02($22) and the Port E Input Pins
– PINE, $01($21). The Port E Input Pin’s address is read only, while the Data Register and the
Data Direction Register are read/write.
Port E Data Register – PORTE
Port E Data Direction Register – DDRE
Port E Input Pins Address – PINE
The Port E Input Pins Address – PINE (Port E Input Pins) – is not a register, and this address
enables access to the physical value on each Port E pin. When reading PORTE the Port E
Data Latch is read, and when reading PINE, the logical values present on the pins are read.
Bit
7
6
5
4
3
2
1
0
$03($23)
PORTE7
PORTE6
PORTE5
PORTE4
–
–
PORTE1
PORTE0
PORTE
Read/Write
R/W
R/W
R/W
R/W
R
R
R
R
Initial Value
0
0
0
0
0
0
0
0
Bit
7
6
5
4
3
2
1
0
$02 ($22)
DDE7
DDE6
DDE5
DDE4
–
–
DDE1
DDE0
DDRE
Read/Write
R/W
R/W
R/W
R/W
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
$01 ($21)
PINE7
PINE6
PINE5
PINE4
–
–
PINE1
PINE0
PINE
Read/Write
R/W
R/W
R/W
R/W
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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