C8051F000/1/2/5/6/7
C8051F010/1/2/5/6/7
Figure 6.8. ADC0H: ADC Data Word MSB Register (C8051F01x)
R/W
Bit7
R/W
Bit6
R/W
Bit5
R/W
Bit4
R/W
Bit3
R/W
Bit2
R/W
Bit1
R/W
Bit0
Reset Value
00000000
SFR Address:
0xBF
Bits7-0: ADC Data Word Bits
For ADLJST = 1: Upper 8-bits of the 10-bit ADC Data Word.
For ADLJST = 0: Bits7-2 are the sign extension of Bit1. Bits 1-0 are the upper 2-bits of the
10-bit ADC Data Word.
Figure 6.9. ADC0L: ADC Data Word LSB Register (C8051F01x)
R/W
Bit7
R/W
Bit6
R/W
Bit5
R/W
Bit4
R/W
Bit3
R/W
Bit2
R/W
Bit1
R/W
Bit0
Reset Value
00000000
SFR Address:
0xBE
Bits7-0: ADC Data Word Bits
For ADLJST = 1: Bits7-6 are the lower 2-bits of the 10-bit ADC Data Word. Bits5-0 will
always read 0.
For ADLJST = 0: Bits7-0 are the lower 8-bits of the 10-bit ADC Data Word.
NOTE: Resulting 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 if 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)
ADC0H:ADC0L
ADC0H:ADC0L
AIN0 – AGND
(ADLJST = 0)
(ADLJST = 1)
(Volts)
REF x (1023/1024)
REF x �½
REF x (511/1024)
0
0x03FF
0x0200
0x01FF
0x0000
0xFFC0
0x8000
0x7FC0
0x0000
EXAMPLE: ADC Data Word Conversion Map, AIN0-AIN1 Differential Input Pair
(AMX0CF=0x01, AMX0SL=0x00)
ADC0H:ADC0L
ADC0H:ADC0L
AIN0 – AIN1 (Volts)
(ADLJST = 0)
(ADLJST = 1)
REF x (511/512)
0x01FF
0x7FC0
0
0x0000
0x0000
-REF x (1/512)
0xFFFF
0xFFC0
-REF
0xFE00
0x8000
Rev. 1.7
46
SILABS [ SILICON LABORATORIES ]
