MC68HC05L28 Datasheet, PDF (101/156 Pages) Motorola, Inc – Flexible general-purpose microcomputer

9.2.2 A/D input register (ADIN)
A/D input register (ADIN)
Address bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
$0016
AD1 AD0 Undefined
The ADIN register allows the A/D input to be read as a static input. Reading this register during an
A/D conversion sequence may inject noise into the analog input and reduce the accuracy of the
A/D result.
Note:
Performing a digital read of the A/D input with levels other than V_DD or V_SS on the ADIN
pin will result in greater power dissipation during the read cycle. This will also give
unpredictable results on the ADIN input.
Reset does not affect the ADIN bit.
9.2.3 A/D result data register (ADDATA)
Address bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
A/D result data register (ADDATA) $0017
Undefined
ADDATA is a read-only register which is used to store the result of an A/D conversion. The result
is loaded into the register from the SAR and the conversion complete flag in the ADSTAT register,
9
COCO, is set.
MC68HC05L28
A/D CONVERTER
TPG
MOTOROLA
9-5