Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK データシート
製品コード
AT91SAM9N12-EK
245
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
23.7.30 PIO Pad Pull-Down Disable Register
Name:
PIO_PPDDR
Addresses:
0xFFFFF490 (PIOA), 0xFFFFF690 (PIOB), 0xFFFFF890 (PIOC), 0xFFFFFA90 (PIOD)
Access:
Write-only
This register can only be written if the WPEN bit is cleared in
• P0-P31: Pull-Down Disable
0: No effect.
1: Disables the pull-down resistor on the I/O line.
23.7.31 PIO Pad Pull-Down Enable Register
Name:
PIO_PPDER
Addresses:
0xFFFFF494 (PIOA), 0xFFFFF694 (PIOB), 0xFFFFF894 (PIOC), 0xFFFFFA94 (PIOD)
Access:
Write-only
This register can only be written if the WPEN bit is cleared in
• P0-P31: Pull-Down Enable
0: No effect.
1: Enables the pull-down resistor on the I/O line.
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
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