User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 56 of 909 2019 Ambiq Micro, Inc.
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C3 E6 19
0 CMPRF0 Comparator Reference 0 Input
1 NCE19
IO Master N Chip Select 19
Table 564, “NCE Encoding Table,” on page 382
Output
2CT6
Timer/Counter Interface Signal 6
See “Implementing Counter/Timer Connections” on
page 394.
Output
3 GPIO19 General Purpose I/O
Input/
Output
4 SCCCLK Secure Card Controller Clock Output
5RSVReserved
6 UART1RX UART1 Receive Input
7 I2SBCLK I2S Bit Clock Input
G6 C2 20
0 SWDCK Software Debug Clock Input
1 NCE20
IO Master N Chip Select 20
Table 564, “NCE Encoding Table,” on page 382
Output
2RSVReserved
3 GPIO20 General Purpose I/O
Input/
Output
4 UART0TX UART0 Transmit Output
5 UART1TX UART1 Transmit Output
6 I2SBCLK I2S Bit Clock Input
7 UA1RTS UART1 Request To Send (RTS) Output
F7 C4 21
0 SWDIO Software Data I/O
Bidirec-
tional
3-state
1 NCE21
IO Master N Chip Select 21
Table 564, “NCE Encoding Table,” on page 382
Output
2 RSV Reserved Output
3 GPIO21 General Purpose I/O
Input/
Output
4 UART0RX UART0 Receive Input
5 UART1RX UART1 Receive Input
6 SCCRST Secure Card Controller Reset Output
7 UA1CTS UART1 Clear To Send (CTS) Input
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