Atmel SAM4L Xplained Pro Starter Kit Atmel ATSAM4L-XSTK ATSAM4L-XSTK Data Sheet
Product codes
ATSAM4L-XSTK
827
42023E–SAM–07/2013
ATSAM4L8/L4/L2
30.9.4
Stepper Motor Mode Register
Name:
SMCR
Access Type:
Read/Write
Offset:
0x08 + n * 0x40
Reset Value:
0x00000000
This register can only be written if write protect is disabled (WPMR.WPEN is zero).
• DOWN: Down Count
0: Up counter.
1: Down counter.
• GCEN: Gray Count Enable
0: TIOAx and TIOBx are driven by internal counter of channel x.
1: TIOAx and TIOBx are driven by a 2-bit gray counter.
31
30
29
28
27
26
25
24
-
-
-
-
-
-
-
-
23
22
21
20
19
18
17
16
-
-
-
-
-
-
-
-
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
6
5
4
3
2
1
0
-
-
-
-
-
-
DOWN
GCEN