Atmel Xplained Evaluation Board AT32UC3A3-XPLD AT32UC3A3-XPLD Datenbogen
Produktcode
AT32UC3A3-XPLD
125
32072H–AVR32–10/2012
AT32UC3A3
11.7.12
Scan Register
Name: SCAN
Access Type:
Read/Write
Offset: 0x2C
Reset Value:
0x0000000
•
EN
0: Keypad scanning is disabled
1: Keypad scanning is enabled
•
PRESC
Prescale select for the keypad scan rate:
Scan rate = 2
(SCAN.PRESC+1)
T
RC
The RC clock period can be found in the Electrical Characteristics section.
•
PIN
The index of the currently active scan pin. Writing to this bitfield has no effect.
31
30
29
28
27
26
25
24
-
-
-
-
-
PIN[2:0]
23
22
21
20
19
18
17
16
-
-
-
-
-
-
-
-
15
14
13
12
11
10
9
8
-
-
-
PRESC[4:0]
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
EN