User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 814 of 909 2019 Ambiq Micro, Inc.
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23.1.2.7 CUSTOMERTRIM2 Register
Customer trim values word2
OFFSET: 0x00000018
INSTANCE 0 ADDRESS: 0x00000018
Customer Programmable trim overrides. Bits in this register are used by software for hardware
configuration.
23.1.2.8 SECURITYOVR Register
Security Override configuration bits
OFFSET: 0x00000020
INSTANCE 0 ADDRESS: 0x00000020
This 32-bit word contains the override configuration for forcing GPIO-based firmware update.
Table 1177: CUSTOMERTRIM Register Bits
Bit Name Reset RW Description
31:3 RSVD 0x3fffffff
Reserved
2
BLE_FEA-
TURE_enable
0x1
BLE Feature Enable Bit
1
BLE_BUCK_en-
able
0x1
BLE Buck Enable Bit
0
SIMO_-
BUCK_enable
0x1
SIMO Buck Enable Bit
Table 1178: CUSTOMERTRIM2 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 XO32M_FREQ_TRIM
Table 1179: CUSTOMERTRIM2 Register Bits
Bit Name Reset RW Description
31:11 RSVD 0x1fffff
Reserved
10:0
XO32M_FRE-
Q_TRIM
0x7ff
XO32 frequency trim. This field can optionally be adjusted to provide better
interoperability performance based on crystal and board design.