User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 403 of 909 2019 Ambiq Micro, Inc.
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which must have the corresponding PADnINPEN bit set and should have the corresponding PADnPULL bit
clear.
11.5.6 Implementing Audio Connections
The Audio signals can be connected to a variety of pads.
11.5.6.1 PDM Connections
The PDM CLK and DATA signals may each be connected to several pads. Note that CLK and DATA are
selected independently. Table 598 shows the connections for PDM CLK, which should have the
corresponding PADnINPEN and PADnPULL bits clear. Table 599 shows the connections for PDM DATA,
which must have the corresponding PADnINPEN bit set and should have the corresponding PADnPULL bit
clear.
Table 596: UART1 RTS Configuration
Field Value Pad
PAD10FNCSEL 5 10
PAD16FNCSEL 7 16
PAD20FNCSEL 7 20
PAD30FNCSEL 5 30
PAD31FNCSEL 7 31
PAD34FNCSEL 2 34
PAD41FNCSEL 5 41
PAD44FNCSEL 0 44
Table 597: UART1 CTS Configuration
Field Value Pad
PAD11FNCSEL 5 11
PAD17FNCSEL 7 17
PAD21FNCSEL 7 21
PAD26FNCSEL 7 26
PAD29FNCSEL 5 29
PAD32FNCSEL 7 32
PAD36FNCSEL 5 36
PAD45FNCSEL 0 45