S912XHY128F0VLM Datasheet, PDF (337/802 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Analog-to-Digital Converter (ADC12B12CV1) Block Description
Table 10-21 shows how depending on the A/D resolution the conversion result is transferred to the ATD
result registers. Compare is always done using all 12 bits of both the conversion result and the compare
value in ATDDRn.
Table 10-21. Conversion result mapping to ATDDRn
A/D
resolution
DJM
conversion result mapping to
ATDDRn
8-bit data 0 Bit[11:4] = result, Bit[3:0]=0000
8-bit data 1 Bit[7:0] = result, Bit[11:8]=0000
10-bit data 0 Bit[11:2] = result, Bit[1:0]=00
10-bit data 1 Bit[9:0] = result, Bit[11:10]=00
12-bit data X Bit[11:0] = result
MC9S12XHY-Family Reference Manual, Rev. 1.01
Freescale Semiconductor
337