S9S12G128F0CLF Datasheet, PDF (461/1158 Pages) Freescale Semiconductor, Inc – MC9S12G Family Reference Manual

14.3.2.12.1 Left Justified Result Data (DJM=0)
Analog-to-Digital Converter (ADC12B16CV2)
Module Base +
0x0010 = ATDDR0, 0x0012 = ATDDR1, 0x0014 = ATDDR2, 0x0016 = ATDDR3
0x0018 = ATDDR4, 0x001A = ATDDR5, 0x001C = ATDDR6, 0x001E = ATDDR7
0x0020 = ATDDR8, 0x0022 = ATDDR9, 0x0024 = ATDDR10, 0x0026 = ATDDR11
0x0028 = ATDDR12, 0x002A = ATDDR13, 0x002C = ATDDR14, 0x002E = ATDDR15
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
Result-Bit[11:0]
W
0
0
0
0
Reset 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 14-14. Left justified ATD conversion result register (ATDDRn)
Table 14-21 shows how depending on the A/D resolution the conversion result is transferred to the ATD
result registers for left justified data. Compare is always done using all 12 bits of both the conversion result
and the compare value in ATDDRn.
Table 14-21. Conversion result mapping to ATDDRn
A/D
resolution
DJM
conversion result mapping to ATDDRn
8-bit data 0
Result-Bit[11:4] = conversion result,
Result-Bit[3:0]=0000
10-bit data 0
Result-Bit[11:2] = conversion result,
Result-Bit[1:0]=00
12-bit data 0 Result-Bit[11:0] = result
14.3.2.12.2 Right Justified Result Data (DJM=1)
Module Base +
0x0010 = ATDDR0, 0x0012 = ATDDR1, 0x0014 = ATDDR2, 0x0016 = ATDDR3
0x0018 = ATDDR4, 0x001A = ATDDR5, 0x001C = ATDDR6, 0x001E = ATDDR7
0x0020 = ATDDR8, 0x0022 = ATDDR9, 0x0024 = ATDDR10, 0x0026 = ATDDR11
0x0028 = ATDDR12, 0x002A = ATDDR13, 0x002C = ATDDR14, 0x002E = ATDDR15
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R0
0
0
0
W
Result-Bit[11:0]
Reset 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 14-15. Right justified ATD conversion result register (ATDDRn)
MC9S12G Family Reference Manual, Rev.1.10
Freescale Semiconductor
461