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ATSAM4S-XPLD
540
SAM4S [DATASHEET]
11100E–ATARM–24-Jul-13
30.7.28 PIO Input Filter Slow Clock Status Register
Name:
PIO_IFSCSR
Address:
0x400E0E88 (PIOA), 0x400E1088 (PIOB), 0x400E1288 (PIOC)
Access:
Read-only
• P0-P31: Glitch or Debouncing Filter Selection Status
0: The Glitch Filter is able to filter glitches with a duration < Tmck2.
1: The Debouncing Filter is able to filter pulses with a duration < Tdiv_slclk/2.
30.7.29 PIO Slow Clock Divider Debouncing Register
Name:
PIO_SCDR
Address:
0x400E0E8C (PIOA), 0x400E108C (PIOB), 0x400E128C (PIOC)
Access:
Read-write
• DIVx: Slow Clock Divider Selection for Debouncing
Tdiv_slclk = 2*(DIV+1)*Tslow_clock.
31
30
29
28
27
26
25
24
P31
P30
P29
P28
P27
P26
P25
P24
23
22
21
20
19
18
17
16
P23
P22
P21
P20
P19
P18
P17
P16
15
14
13
12
11
10
9
8
P15
P14
P13
P12
P11
P10
P9
P8
7
6
5
4
3
2
1
0
P7
P6
P5
P4
P3
P2
P1
P0
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
9
8
–
–
DIV
7
6
5
4
3
2
1
0
DIV