mc68hc908bd48 Freescale Semiconductor, Inc, mc68hc908bd48 Datasheet - Page 158

• Manufacturer Part Number: mc68hc908bd48
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Analog-to-Digital Converter (ADC)
12.7.1 ADC Voltage In (ADCVIN)
12.8 I/O Registers
12.8.1 ADC Status and Control Register
Data Sheet
158
Address:
ADCVIN is the input voltage signal from one of the 6 ADC channels to
the ADC module.
Three I/O registers control and monitor ADC operation:
The following paragraphs describe the function of the ADC status and
control register.
COCO — Conversions Complete Bit
Reset:
Read:
Write:
•
•
•
When the AIEN bit is a logic 0, the COCO is a read-only bit which is
set each time a conversion is completed. This bit is cleared whenever
the ADC status and control register is written or whenever the ADC
data register is read. Reset clears this bit.
When the AIEN bit is a logic 1 (CPU interrupt enabled), the COCO is
a read-only bit, and will always be logic 0 when read.
Figure 12-2. ADC Status and Control Register (ADSCR)
1 = conversion completed (AIEN = 0)
0 = conversion not completed (AIEN = 0)
ADC status and control register (ADSCR, $005D)
ADC data register (ADR, $005E)
ADC clock register (ADICLK, $005F)
$005D
COCO
Bit 7
Analog-to-Digital Converter (ADC)
0
= Unimplemented
AIEN
6
0
ADCO
5
0
ADCH4
4
1
ADCH3
3
1
MC68HC908BD48
ADCH2
Freescale Semiconductor
2
1
ADCH1
1
1
—
Rev. 2.1
ADCH0
Bit 0
1