User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 499 of 909 2019 Ambiq Micro, Inc.
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Table 727: ALTPADCFGH Register
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
RSVD
PAD31_SR
RSVD
PAD31_DS1
RSVD
PAD30_SR
RSVD
PAD30_DS1
RSVD
PAD29_SR
RSVD
PAD29_DS1
RSVD
PAD28_SR
RSVD
PAD28_DS1
Table 728: ALTPADCFGH Register Bits
Bit Name Reset RW Description
31:29 RSVD 0x0 RO
RESERVED
28 PAD31_SR 0x0 RW
Pad 31 slew rate selection.
SR_EN = 0x1 - Enables Slew rate control on pad
27:25 RSVD 0x0 RO
RESERVED
24 PAD31_DS1 0x0 RW
Pad 31 high order drive strength selection. Used in conjunction with
PAD31STRNG field to set the pad drive strength.
23:21 RSVD 0x0 RO
RESERVED
20 PAD30_SR 0x0 RW
Pad 30 slew rate selection.
SR_EN = 0x1 - Enables Slew rate control on pad
19:17 RSVD 0x0 RO
RESERVED
16 PAD30_DS1 0x0 RW
Pad 30 high order drive strength selection. Used in conjunction with
PAD30STRNG field to set the pad drive strength.
15:13 RSVD 0x0 RO
RESERVED
12 PAD29_SR 0x0 RW
Pad 29 slew rate selection.
SR_EN = 0x1 - Enables Slew rate control on pad
11:9 RSVD 0x0 RO
RESERVED
8 PAD29_DS1 0x0 RW
Pad 29 high order drive strength selection. Used in conjunction with
PAD29STRNG field to set the pad drive strength.
7:5 RSVD 0x0 RO
RESERVED
4 PAD28_SR 0x0 RW
Pad 28 slew rate selection.
SR_EN = 0x1 - Enables Slew rate control on pad