C8051F02X Datasheet, PDF (68/272 Pages) Silicon Laboratories – 8K ISP FLASH MCU Family

C8051F022/3
Figure 6.11. ADC0 Data Word Example (C8051F022/3)
10-bit ADC Data Word appears in the ADC Data Word Registers as follows:
ADC0H[1:0]:ADC0L[7:0], if ADLJST = 0
(ADC0H[7:2] will be sign-extension of ADC0H.1 for a differential reading, otherwise =
000000b).
ADC0H[7:0]:ADC0L[7:6], if ADLJST = 1
(ADC0L[5:0] = 000000b).
Example: ADC Data Word Conversion Map, AIN0 Input in Single-Ended Mode
(AMX0CF = 0x00, AMX0SL = 0x00)
AIN0-AGND (Volts)
ADC0H:ADC0L
(ADLJST = 0)
ADC0H:ADC0L
(ADLJST = 1)
VREF * (1023/1024)
0x03FF
0xFFC0
VREF / 2
0x0200
0x8000
VREF * (511/1024)
0x01FF
0x7FC0
0
0x0000
0x0000
Example: ADC Data Word Conversion Map, AIN0-AIN1 Differential Input Pair
(AMX0CF = 0x01, AMX0SL = 0x00)
AIN0-AGND (Volts)
ADC0H:ADC0L
(ADLJST = 0)
ADC0H:ADC0L
(ADLJST = 1)
VREF * (511/512)
0x01FF
0x7FC0
VREF / 2
0x0100
0x4000
VREF * (1/512)
0x0001
0x0040
0
0x0000
0x0000
-VREF * (1/512)
0xFFFF (-1)
0xFFC0
-VREF / 2
0xFF00 (-256)
0xC000
-VREF
0xFE00 (-512)
0x8000
ADLJST = 0:
Code = Vin × --^G-----^a---ⁱ--ⁿ--- × 2ⁿ ; ‘n’ = 10 for Single-Ended; ‘n’=9 for Differential.
VREF
68
Rev. 1.4