User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 491 of 909 2019 Ambiq Micro, Inc.
All rights reserved.
Table 715: ALTPADCFGB 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
PAD7_SR
RSVD
PAD7_DS1
RSVD
PAD6_SR
RSVD
PAD6_DS1
RSVD
PAD5_SR
RSVD
PAD5_DS1
RSVD
PAD4_SR
RSVD
PAD4_DS1
Table 716: ALTPADCFGB Register Bits
Bit Name Reset RW Description
31:29 RSVD 0x0 RO
RESERVED
28 PAD7_SR 0x0 RW
Pad 7 slew rate selection.
SR_EN = 0x1 - Enables Slew rate control on pad
27:25 RSVD 0x0 RO
RESERVED
24 PAD7_DS1 0x0 RW
Pad 7 high order drive strength selection. Used in conjunction with
PAD7STRNG field to set the pad drive strength.
23:21 RSVD 0x0 RO
RESERVED
20 PAD6_SR 0x0 RW
Pad 6 slew rate selection.
SR_EN = 0x1 - Enables Slew rate control on pad
19:17 RSVD 0x0 RO
RESERVED
16 PAD6_DS1 0x0 RW
Pad 6 high order drive strength selection. Used in conjunction with
PAD6STRNG field to set the pad drive strength.
15:13 RSVD 0x0 RO
RESERVED
12 PAD5_SR 0x0 RW
Pad 5 slew rate selection.
SR_EN = 0x1 - Enables Slew rate control on pad
11:9 RSVD 0x0 RO
RESERVED
8 PAD5_DS1 0x0 RW
Pad 5 high order drive strength selection. Used in conjunction with
PAD5STRNG field to set the pad drive strength.
7:5 RSVD 0x0 RO
RESERVED
4 PAD4_SR 0x0 RW
Pad 4 slew rate selection.
SR_EN = 0x1 - Enables Slew rate control on pad