C8051F93X-C8051F92X 查看數據表（PDF） - Silicon Laboratories
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C8051F93X-C8051F92X
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C8051F93X-C8051F92X Datasheet PDF : 330 Pages
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C8051F93x-C8051F92x
SFR Definition 5.12. ADC0MX: ADC0 Input Channel Select
Bit
7
6
5
4
3
2
1
0
Name
AD0MX
Type
R
R
R
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
1
1
1
1
1
SFR Page = 0x0; SFR Address = 0xBB
Bit Name
Function
7:5 Unused Unused.
Read = 000b; Write = Don’t Care.
4:0 AD0MX AMUX0 Positive Input Selection.
Selects the positive input channel for ADC0.
00000:
00001:
P0.0
P0.1
10000:
10001:
P2.0 (C8051F920/30 Only)
P2.1 (C8051F920/30 Only)
00010:
00011:
P0.2
P0.3
10010:
10011:
P2.2 (C8051F920/30 Only)
P2.3 (C8051F920/30 Only)
00100:
00101:
P0.4
P0.5
10100:
10101:
P2.4 (C8051F920/30 Only)
P2.5 (C8051F920/30 Only)
00110:
P0.6
10110:
P2.6 (C8051F920/30 Only)
00111:
01000:
P0.7
P1.0
10111:
11000:
Reserved.
Reserved.
01001:
01010:
01011:
01100:
01101:
01110:
01111:
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7 (C8051F920/30
Only)
11001:
11010:
11011:
11100:
11101:
11110:
Reserved.
Reserved.
Temperature Sensor*
VBAT Supply Voltage
(0.9–1.8 V) or (1.8–3.6 V)
Digital Supply Voltage
(VREG0 Output, 1.7 V Typical)
VDD/DC+ Supply Voltage
(1.8–3.6 V)
11111:
Ground
*Note: Before switching the ADC multiplexer from another channel to the temperature sensor, the ADC mux should
select the 'Ground' channel as an intermediate step. The intermediate 'Ground' channel selection step will
discharge any voltage on the ADC sampling capacitor from the previous channel selection. This will prevent
the possibility of a high voltage (> 2V) being presented to the temperature sensor circuit, which can otherwise
impact its long-term reliability.
Rev. 1.3
85
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