LFEBS12UB Freescale Semiconductor, LFEBS12UB Datasheet - Page 524

• Manufacturer Part Number: LFEBS12UB
• Description: KIT STUDENT LEARNING S12 DG128
• Manufacturer: Freescale Semiconductor

Specifications of LFEBS12UB

• Architecture: 8/16-bit
• Code Gen Tools Included: Code Warrior
• Silicon Manufacturer: Freescale
• Core Architecture: S12
• Core Sub-architecture: S12
• Silicon Core Number: MC9S12
• Silicon Family Name: S12D
• Kit Contents: HCS12 DG128 Learning Kit
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Chapter 13 Analog-to-Digital Converter (ADC12B16CV1)
13.3.2.12 ATD Conversion Result Registers (ATDDRn)
The A/D conversion results are stored in 16 result registers. Results are always in unsigned data
representation. Left and right justification is selected using the DJM control bit in ATDCTL3.
If automatic compare of conversions results is enabled (CMPE[n]=1 in ATDCMPE), these registers must
be written with the compare values in left or right justified format depending on the actual value of the
DJM bit. In this case, as the ATDDRn register is used to hold the compare value, the result will not be
stored there at the end of the conversion but is lost.
Read: Anytime
Write: Anytime
13.3.2.12.1 Left Justified Result Data (DJM=0)
13.3.2.12.2 Right Justified Result Data (DJM=1)
Table 13-16
result registers. Compare is always done using all 12 bits of both the conversion result and the compare
value in ATDDRn.
524
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
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
Because of an order from the United States International Trade Commission, BGA-packaged product lines and partnumbers
Reset
Reset
indicated here currently are not available from Freescale for import or sale in the United States prior to September 2010
W
W
R
R
Bit 11 Bit 10 Bit 9
15
15
0
0
0
shows how depending on the A/D resolution the conversion result is transferred to the ATD
For conversions not using automatic compare, results are stored in the result
registers after each conversion. In this case avoid writing to ATDDRn except
for initial values, because an A/D result might be overwritten.
14
14
0
0
0
Figure 13-15. Right justified ATD conversion result register (ATDDRn)
Figure 13-14. Left justified ATD conversion result register (ATDDRn)
13
13
0
0
0
Bit 8
12
12
0
0
0
MC9S12XE-Family Reference Manual , Rev. 1.23
Bit 11 Bit 10 Bit 9
Bit 7
11
11
0
0
Bit 6
10
10
0
0
Bit 5
0
0
9
9
NOTE
Bit 4
Bit 8
0
0
8
8
Bit 3
Bit 7
0
0
7
7
Bit 2
Bit 6
0
0
6
6
Bit 1
Bit 5
0
0
5
5
Bit 0
Bit 4
0
0
4
4
Bit 3
0
0
0
3
3
Freescale Semiconductor
Bit 2
2
0
0
2
0
Bi1 1
0
0
0
1
1
Bit 0
0
0
0
0
0