MC68HC705P9CDW FREESCALE [Freescale Semiconductor, Inc], MC68HC705P9CDW Datasheet - Page 136

• Manufacturer Part Number: MC68HC705P9CDW
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Analog-to-Digital Converter (ADC)
11.7.2 ADC Data Register
11.8 Low-Power Modes
11.8.1 Stop Mode
11.8.2 Wait Mode
Technical Data
136
To prevent excess power dissipation, do not use an ADC pin as an
analog input and a digital input at the same time.
Using one of the port pins as the ADC input does not affect the ability to
use the remaining port pins as digital inputs.
Reading a port pin that is selected as an analog input returns a logic
zero.
The ADC data register (ADDR) is a read-only register that contains the
result of the most recent analog-to-digital conversion.
The STOP instruction turns off the ADC and aborts any current and
pending conversions.
The ADC continues to operate normally after the WAIT instruction. To
reduce power consumption in wait mode:
$001D
Reset:
Read:
Write:
•
•
Freescale Semiconductor, Inc.
For More Information On This Product,
If the ADC is not being used, clear both the ADON and ADRC bits
before entering wait mode.
If the ADC is being used and the internal clock rate is above
1 MHz, clear the ADRC bit before entering wait mode.
Bit 7
Bit 7
Analog-to-Digital Converter (ADC)
Go to: www.freescale.com
Figure 11-4. ADC Data Register (ADDR)
6
6
5
5
Unaffected by reset
4
4
3
3
MC68HC705P9 — Rev. 4.0
2
2
1
1
MOTOROLA
Bit 0
Bit 0