M68HC11 Datasheet, PDF (220/336 Pages) Motorola, Inc – Technical Data

Analog-to-Digital (A/D) Converter
10.11 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 10-3, which shows the A/D conversion sequence diagram.
Register name: Analog-to-Digital Converter Result Register 1 Address: $1031
Bit 7
6
5
4
3
2
1
Bit 0
Read: Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Write:
Reset:
Indeterminate after reset
Register name: Analog-to-Digital Converter Result Register 2 Address: $1032
Bit 7
6
5
4
3
2
1
Bit 0
Read: Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Write:
Reset:
Indeterminate after reset
Register name: Analog-to-Digital Converter Result Register 3 Address: $1033
Bit 7
6
5
4
3
2
1
Bit 0
Read: Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Write:
Reset:
Indeterminate after reset
Register name: Analog-to-Digital Converter Result Register 4 Address: $1034
Bit 7
6
5
4
3
2
1
Bit 0
Read: Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Write:
Reset:
Indeterminate after reset
= Unimplemented
Figure 10-6. Analog-to-Digital Converter
Result Registers (ADR1–ADR4)
Technical Data
220
Analog-to-Digital (A/D) Converter
MC68HC11E Family — Rev. 4
MOTOROLA