MC68HC705T16 MOTOROLA [Motorola, Inc], MC68HC705T16 Datasheet - Page 91

• Manufacturer Part Number: MC68HC705T16
• Description: High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit
• Manufacturer: MOTOROLA [Motorola, Inc]

10.3
This read/write register, located at address $3C, contains six control bits and one status bit.
RESULT - Comparator Status (Read Only)
CHNL - Channel Select
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.
MC68HC05T16
1 (set)
0 (clear) –
1 (set)
0 (clear) –
Address
$3C
ADC Control and Status Register
RESULT
–
–
bit 7
AD4-0 value greater than analog in.
AD4-0 value is less than analog in.
ADCIN1 is selected for conversion.
ADCIN0 is selected for conversion
bit 6
ANALOG TO DIGITAL CONVERTER
CHNL
bit 5
bit 4
AD4
bit 3
AD3
bit 2
AD2
bit 1
AD1
bit 0
AD0
u000 0000
on reset
State
MOTOROLA
TPG
10-3
10