Preliminary C8051F120/1/2/3 C8051F124/5/6/7 - KEMT FEI TUKE

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C8051F120/1/2/3 C8051F124/5/6/7 Preliminary Figure 6.9. ADC0H: ADC0 Data Word MSB Register SFR Page: SFR Address: 0 0xBF R/W R/W R/W R/W R/W R/W R/W R/W Reset Value 00000000 Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Bits7-0: ADC0 Data Word High-Order Bits. For AD0LJST = 0: Bits 7-4 are the sign extension of Bit3. Bits 3-0 are the upper 4 bits of the 10-bit ADC0 Data Word. For AD0LJST = 1: Bits 7-0 are the most-significant bits of the 10-bit ADC0 Data Word. Figure 6.10. ADC0L: ADC0 Data Word LSB Register SFR Page: SFR Address: 0 0xBE R/W R/W R/W R/W R/W R/W R/W R/W Reset Value 00000000 Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Bits7-0: ADC0 Data Word Low-Order Bits. For AD0LJST = 0: Bits 7-0 are the lower 8 bits of the 10-bit ADC0 Data Word. For AD0LJST = 1: Bits 7-4 are the lower 4 bits of the 10-bit ADC0 Data Word. Bits3-0 will always read ‘0’. Page 74 DS008-0.8-AUG02 © 2002 Cygnal Integrated Products, Inc.
Preliminary C8051F120/1/2/3 C8051F124/5/6/7 Figure 6.11. ADC0 Data Word Example 10-bit ADC0 Data Word appears in the ADC0 Data Word Registers as follows: ADC0H[1:0]:ADC0L[7:0], if AD0LJST = 0 (ADC0H[7:2] will be sign-extension of ADC0H.1 for a differential reading, otherwise = 000000b). ADC0H[7:0]:ADC0L[7:6], if AD0LJST = 1 (ADC0L[5:0] = 00b). Example: ADC0 Data Word Conversion Map, AIN0.0 Input in Single-Ended Mode (AMX0CF = 0x00, AMX0SL = 0x00) AIN0.0-AGND ADC0H:ADC0L ADC0H:ADC0L (Volts) (AD0LJST = 0) (AD0LJST = 1) VREF * (1023/1024) 0x03FF 0xFFC0 VREF / 2 0x0800 0x8000 VREF * (511/1024) 0x01FF 0x7FC0 0 0x0000 0x0000 Example: ADC0 Data Word Conversion Map, AIN0.0-AIN0.1 Differential Input Pair (AMX0CF = 0x01, AMX0SL = 0x00) AIN0.0-AIN0.1 ADC0H:ADC0L ADC0H:ADC0L (Volts) (AD0LJST = 0) (AD0LJST = 1) VREF * (511/512) 0x01FF 0x7FC0 VREF / 2 0x0100 0x4000 VREF * (1/512) 0x0001 0x0040 0 0x0000 0x0000 -VREF * (1/512) 0xFFFF (-1d) 0xFFC0 -VREF / 2 0xFF00 (-256d) 0xC000 -VREF 0xFE00 (-512d) 0x8000 For AD0LJST = 0: Gain Code = Vin × -------------- × 2 VREF n ; ‘n’ = 10 for Single-Ended; ‘n’= 9 for Differential. © 2002 Cygnal Integrated Products, Inc. DS008-0.8-AUG02 Page 75
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Preliminary C8051F120/1/2/3 C8051F124/5/6/7 - KEMT FEI TUKE

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