Atmel Evaluation Kit AT91SAM9X35-EK AT91SAM9X35-EK Data Sheet
Product codes
AT91SAM9X35-EK
240
SAM9X35 [DATASHEET]
11055E–ATARM–10-Mar-2014
23.7.28 PIO Input Filter Slow Clock Status Register
Name:
PIO_IFSCSR
Address:
0xFFFFF488 (PIOA), 0xFFFFF688 (PIOB), 0xFFFFF888 (PIOC), 0xFFFFFA88 (PIOD)
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.
23.7.29 PIO Slow Clock Divider Debouncing Register
Name:
PIO_SCDR
Address:
0xFFFFF48C (PIOA), 0xFFFFF68C (PIOB), 0xFFFFF88C (PIOC), 0xFFFFFA8C (PIOD)
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