Z8FMC16100 Datasheet, PDF (224/402 Pages) Zilog, Inc. – Z8 Encore-R Motor Control Flash MCUs

Z8 Encore!^® Motor Control Flash MCUs
Product Specification
202
Figure 38 illustrates the timing of an ADC convert period.
ADC Clock
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
BUSY
13-Clock
Convert Period
Figure 38. ADC Convert Timing
ADC Interrupt
The ADC can generate an interrupt request when a conversion has been completed. An
interrupt request that is pending when the ADC is disabled is not automatically cleared.
ADC Timer 0 Capture
The Timer 0 count is captured for every ADC conversion. The capture of the Timer 0
count occurs after the programmed sample time is complete for every conversion and
stored in the ADC Timer Capture Register (ADCTCAP).
Reference Buffer
The reference buffer, RBUF, supplies the reference voltage for the ADC. When enabled,
the internal voltage reference generator supplies the ADC and the voltage is available on
the V_REF pin. When RBUF is disabled, the ADC must have the reference voltage supplied
externally through the V_REF pin. RBUF is controlled by the REFEN bit in the ADC Control
Register.
Internal Voltage Reference Generator
The Internal Voltage Reference Generator provides the voltage, VR2, for the RBUF. VR2
is 2 volts.
Analog-to-Digital Converter
PRELIMINARY
PS024604-1005