Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256 Benutzerhandbuch
Produktcode
DEMO9S12XHY256
Analog-to-Digital Converter (ADC12B12CV1) Block Description
MC9S12XHY-Family Reference Manual, Rev. 1.04
334
Freescale Semiconductor
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.
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