User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 423 of 909 2019 Ambiq Micro, Inc.
All rights reserved.
21:19 PAD10FNCSEL 0x3 RW
Pad 10 function select
RSVD0 = 0x0 - Reserved
M1MOSI = 0x1 - Configure as the IOMSTR1 SPI MOSI signal
NCE10 = 0x2 - IOM/MSPI nCE group 10
GPIO10 = 0x3 - Configure as GPIO10
PDMCLK = 0x4 - PDM serial clock out
UA1RTS = 0x5 - Configure as the UART1 RTS output signal
RSVD6 = 0x6 - Reserved
RSVD7 = 0x7 - REserved
18 PAD10STRNG 0x0 RW
Pad 10 drive strength
LOW = 0x0 - Low drive strength
HIGH = 0x1 - High drive strength
17 PAD10INPEN 0x0 RW
Pad 10 input enable
DIS = 0x0 - Pad input disabled
EN = 0x1 - Pad input enabled
16 PAD10PULL 0x0 RW
Pad 10 pullup enable
DIS = 0x0 - Pullup disabled
EN = 0x1 - Pullup enabled
15:14 PAD9RSEL 0x0 RW
Pad 9 pullup resistor selection
PULL1_5K = 0x0 - Pullup is ~1.5 KOhms
PULL6K = 0x1 - Pullup is ~6 KOhms
PULL12K = 0x2 - Pullup is ~12 KOhms
PULL24K = 0x3 - Pullup is ~24 KOhms
13:11 PAD9FNCSEL 0x3 RW
Pad 9 function select
M1SDAWIR3 = 0x0 - Configure as the IOMSTR1 I2C SDA or SPI WIR3 sig-
nal
M1MISO = 0x1 - Configure as the IOMSTR1 SPI MISO signal
NCE9 = 0x2 - IOM/MSPI nCE group 9
GPIO9 = 0x3 - Configure as GPIO9
SCCIO = 0x4 - SCARD data I/O connection
RSVD5 = 0x5 - Reserved
UART1RX = 0x6 - Configure as UART1 RX input signal
RSVD7 = 0x7 - Reserved
10 PAD9STRNG 0x0 RW
Pad 9 drive strength
LOW = 0x0 - Low drive strength
HIGH = 0x1 - High drive strength
9 PAD9INPEN 0x0 RW
Pad 9 input enable
DIS = 0x0 - Pad input disabled
EN = 0x1 - Pad input enabled
8PAD9PULL 0x0RW
Pad 9 pullup enable
DIS = 0x0 - Pullup disabled
EN = 0x1 - Pullup enabled
Table 630: PADREGC Register Bits
Bit Name Reset RW Description