
Analog-to-Digital (A/D) Converter
A/D Converter Result Registers
M68HC11E Family — Rev. 5
Data Sheet
MOTOROLA
Analog-to-Digital (A/D) Converter
For More Information On This Product,
Go to: www.freescale.com
71
3.10 A/D Converter Result Registers
These read-only registers hold an 8-bit conversion result. Writes to these registers
have no effect. Data in the A/D converter result registers is valid when the CCF flag
in the ADCTL register is set, indicating a conversion sequence is complete. If
conversion results are needed sooner, refer to
Figure 3-3
, which shows the A/D
conversion sequence diagram.
Register name: Analog-to-Digital Converter Result Register 1
Address: $1031
Bit 7
Bit 7
6
5
4
3
2
1
Bit 0
Bit 0
Read:
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Write:
Reset:
Indeterminate after reset
Register name: Analog-to-Digital Converter Result Register 2
Address: $1032
Bit 7
Bit 7
6
5
4
3
2
1
Bit 0
Bit 0
Read:
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Write:
Reset:
Indeterminate after reset
Register name: Analog-to-Digital Converter Result Register 3
Address: $1033
Bit 7
Bit 7
6
5
4
3
2
1
Bit 0
Bit 0
Read:
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Write:
Reset:
Indeterminate after reset
Register name: Analog-to-Digital Converter Result Register 4
Address: $1034
Bit 7
Bit 7
6
5
4
3
2
1
Bit 0
Bit 0
Read:
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Write:
Reset:
Indeterminate after reset
= Unimplemented
Figure 3-6. Analog-to-Digital Converter
Result Registers (ADR1–ADR4)
F
Freescale Semiconductor, Inc.
n
.