Silicon Laboratories EFR32xG14 Wireless Gecko Reference Manual page 879

Bit Name
23:16 NEGSEL
Selects the negative input to the ADC for Single Channel Differential mode (in case of singled ended mode, the negative
input is grounded). The user can choose any of the 32 channels of any of the 5 BUSes but must ensure that POSSEL and
NEGSEL are chosen from different resources (X or Y) BUS. In case of an invalid configuration, the ADC will perform a sin-
gle-ended sampling and issue a BUSCONFLICT IRQ.
Mode
APORT0XCH0
APORT0XCH1
...
APORT0XCH15
APORT0YCH0
APORT0YCH1
APORT0YCH15
APORT1XCH0
APORT1YCH1
...
APORT1YCH31
APORT2YCH0
APORT2XCH1
...
APORT2XCH31
APORT3XCH0
APORT3YCH1
...
APORT3YCH31
APORT4YCH0
APORT4XCH1
...
APORT4XCH31
TESTN
VSS
15:8 POSSEL
Selects the positive input to the ADC for single channel operation. Software can choose any of the 32 channels of any BUS
as positive input. In DIFF mode POSSEL and NEGSEL need to be chosen from different resources (X or Y). If an X BUS is
connected to POSSEL, only a Y BUS can connect to NEGSEL, and vice-versa. The user can also select some internal
nodes as positive input for single-ended sampling. These internal nodes cannot be sampled differentially.
Mode
APORT0XCH0
APORT0XCH1
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Reset Access Description
0xFF RW Single Channel Negative Input Selection
Value Description
0 Select APORT0XCH0
1 Select APORT0XCH1
... ........
15 Select APORT0XCH15
16 Select APORT0YCH0
17 Select APORT0YCH1
31 Select APORT0YCH15
32 Select APORT1XCH0
33 Select APORT1YCH1
... ........
63 Select APORT1YCH31
64 Select APORT2YCH0
65 Select APORT2XCH1
... ........
95 Select APORT2XCH31
96 Select APORT3XCH0
97 Select APORT3YCH1
... ........
127 Select APORT3YCH31
128 Select APORT4YCH0
129 Select APORT4XCH1
... ........
159 Select APORT4XCH31
245 Reserved for future expansion
255 VSS
0xFF RW Single Channel Positive Input Selection
Value Description
0 Select APORT0XCH0
1 Select APORT0XCH1
Reference Manual
ADC - Analog to Digital Converter
Rev. 1.1 | 879