mc68hc908qb4 Freescale Semiconductor, Inc, mc68hc908qb4 Datasheet - Page 48

• Manufacturer Part Number: mc68hc908qb4
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Analog-to-Digital Converter (ADC10) Module
3.8.2 ADC10 Result High Register (ADRH)
This register holds the MSBs of the result and is updated each time a conversion completes. All other bits
read as 0s. Reading ADRH prevents the ADC10 from transferring subsequent conversion results into the
result registers until ADRL is read. If ADRL is not read until the after next conversion is completed, then
the intermediate conversion result will be lost. In 8-bit mode, this register contains no interlocking with
ADRL.
3.8.3 ADC10 Result Low Register (ADRL)
This register holds the LSBs of the result. This register is updated each time a conversion completes.
Reading ADRH prevents the ADC10 from transferring subsequent conversion results into the result
registers until ADRL is read. If ADRL is not read until the after next conversion is completed, then the
intermediate conversion result will be lost. In 8-bit mode, there is no interlocking with ADRH.
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Reset:
Reset:
Reset:
Read:
Write:
Read:
Write:
Read:
Write:
Figure 3-5. ADC10 Data Register High (ADRH), 10-Bit Mode
Figure 3-4. ADC10 Data Register High (ADRH), 8-Bit Mode
Bit 7
Bit 7
Bit 7
AD7
0
0
0
0
0
Figure 3-6. ADC10 Data Register Low (ADRL)
= Unimplemented
= Unimplemented
= Unimplemented
AD6
6
0
0
6
0
0
6
0
MC68HC908QB8 Data Sheet, Rev. 2
AD5
5
0
0
5
0
0
5
0
AD4
0
0
0
4
0
4
0
4
AD3
3
0
0
3
0
0
3
0
AD2
2
0
0
2
0
0
2
0
AD9
AD1
1
0
0
1
0
1
0
Freescale Semiconductor
Bit 0
Bit 0
AD8
Bit 0
AD0
0
0
0
0