User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 62 of 909 2019 Ambiq Micro, Inc.
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J6 - 38
0 TRIG3 ADC Trigger Input 3 Input
1 NCE38
IO Master N Chip Select 38
Table 564, “NCE Encoding Table,” on page 382
Output
2 UA0CTS UART0 Clear To Send (CTS) Input
3 GPIO38 General Purpose I/O
Input/
Output
4RSVReserved
5 M3MOSI SPI Master 3 Output Data Output
6 UART1RX UART1 Receive Input
7RSVReserved
J8 H2 39
0 UART0TX UART0 Transmit Output
1 UART1TX UART1 Transmit Output
2CT25
Timer/Counter Interface Signal 25
See “Implementing Counter/Timer Connections” on
page 394.
Output
3 GPIO39 General Purpose I/O
Input/
Output
4 M4SCL I2C Master 4 Clock
Open
Drain
5 M4SCK SPI Master 4 Clock Output
6RSVReserved
7RSVReserved
J9 H1 40
0 UART0RX UART0 Receive Input
1 UART1RX UART1 Receive Input
2 TRIG0 ADC Trigger Input 0 Input
3 GPIO40 General Purpose I/O
Input/
Output
4 M4SDAWIR3
I2C Master 4 I/O Data
SPI Master 4 3 Wire Data
Bidirec-
tional
Open
Drain
5 M4MISO SPI Master 4 Data Input Input
6RSVReserved
7RSVReserved
E5 H3 41
0 NCE41
IO Master N Chip Select 41
Table 564, “NCE Encoding Table,” on page 382
Output
1 BLEIF_IRQ BLE Interface IRQ Observation Output
2 SWO Serial Wire Debug Output Output
3 GPIO41 General Purpose I/O
Input/
Output
4 I2SWCLK I2S Word Clock Input
5 UA1RTS UART1 Request To Send (RTS) Output
6 UART0TX UART0 Transmit Output
7 UA0RTS UART0 Request To Send (RTS) Output
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