MC68HC908GT16 Datasheet, PDF (95/412 Pages) Motorola, Inc – Microcontrollers

Analog-to-Digital Converter (ADC)
I/O Registers
package. Routing V_REFH close and parallel to V_REFL may improve
common mode noise rejection.
5.7.5 ADC Voltage In (V_ADIN)
V_ADIN is the input voltage signal from one of the eight ADC channels to
the ADC module.
5.8 I/O Registers
These I/O registers control and monitor ADC operation:
• ADC status and control register (ADSCR)
• ADC data register (ADR)
• ADC clock register (ADCLK)
5.8.1 ADC Status and Control Register
Function of the ADC status and control register (ADSCR) is described
here.
Address: $003C
Bit 7
6
5
4
3
2
1
Bit 0
Read:
COCO
Write:
AIEN
ADCO ADCH4 ADCH3 ADCH2 ADCH1 ADCH0
Reset: 0
0
0
1
1
1
1
1
Figure 5-2. ADC Status and Control Register (ADSCR)
COCO — Conversions Complete
When the AIEN bit is a logic 0, the COCO is a read-only bit which is
set each time a conversion is completed except in the continuous
conversion mode where it is set after the first conversion. This bit is
cleared whenever the ADSCR is written or whenever the ADR is read.
MC68HC908GT16 • MC68HC908GT8 — Rev. 2
MOTOROLA
Analog-to-Digital Converter (ADC)
Technical Data
95