MC68HC05T16 Datasheet, PDF (91/128 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit

10.3
ADC Control and Status Register
Address bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
$3C RESULT
CHNL AD4 AD3 AD2 AD1 AD0 u000 0000
This read/write register, located at address $3C, contains six control bits and one status bit.
RESULT - Comparator Status (Read Only)
1 (set) – AD4-0 value greater than analog in.
0 (clear) – AD4-0 value is less than analog in.
CHNL - Channel Select
1 (set) – ADCIN1 is selected for conversion.
0 (clear) – ADCIN0 is selected for conversion
AD4-0 - ADC Digital Result
These bits are written by the user to perform successive approximations in software. When a value
causes the RESULT bit to change state from the value immediately before or after it, AD4-0 are
considered to be the digital equivalent of the analog input. Note that when AD4-0 are all 1’s, ADC
is virtually turned off to minimize power consumption.
10
MC68HC05T16
ANALOG TO DIGITAL CONVERTER
TPG
MOTOROLA
10-3