User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 58 of 909 2019 Ambiq Micro, Inc.
All rights reserved.
A8 D3 25
0 UART1RX UART1 Receive Input
1 NCE25
IO Master N Chip Select 25
Table 564, “NCE Encoding Table,” on page 382
Output
2CT1
Timer/Counter Interface Signal 1
See “Implementing Counter/Timer Connections” on
page 394.
Output
3 GPIO25 General Purpose I/O
Input/
Output
4 M2SDAWIR3
I2C Master 2 I/O Data
SPI Master 2 3 Wire Data
Bidirec-
tional
Open-
Drain
5 M2MISO SPI Master 2 Input Data Input
6RSVReserved
7RSVReserved
B8 A2 26
0RSVReserved
1 NCE26
IO Master N Chip Select 26
Table 564, “NCE Encoding Table,” on page 382
Output
2CT3
Timer/Counter Interface Signal 3
See “Implementing Counter/Timer Connections” on
page 394.
Output
3 GPIO26 General Purpose I/O
Input/
Output
4 SCCRST Secure Card Controller Reset Output
5MSPI1
MSPI Master Interface Signal 1
See “MSPI Connection” on page 393.
Input/
Output
6 UART0TX UART0 Transmit Output
7 UA1CTS UART1 Clear To Send (CTS) Input
B9 E3 27
0 UART0RX UART0 Receive Input
1 NCE27
IO Master N Chip Select 27
Table 564, “NCE Encoding Table,” on page 382
Output
2CT5
Timer/Counter Interface Signal 5
See “Implementing Counter/Timer Connections” on
page 397.
Output
3 GPIO27 General Purpose I/O
Input/
Output
4 M2SCL I2C Master 2 Clock
Open
Drain
5 M2SCK SPI Master 2 Clock Output
6RSVReserved
7RSVReserved
Table 1: Pin List and Function Table
BGA
Pin
Number
CSP Pin
Number
GPIO Pad
Number
Function
Select
Number
Pad Function
Name
Description Pin Type