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| Z8F0830HH020SG Datasheet, PDF (117/257 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers | |||
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Z8 Encore!® F0830 Series
Product Specification
99
Internal Voltage
Reference Generator
VR2
RBUF
REFEN
Sel 28 Package
VREF
10
Data
Output
BUSY
Analog-to-Digital
Converter
Reference Input
Analog Input
Sample-and-Hold
Amplifier
Analog Input
Multiplexer
ADCLK
ADCEN
START
ANAIN[2:0]
ANA0
ANA1
ANA2
ANA3
ANA4
ANA5
ANA6
ANA7
SAMPLE/HOLD
Figure 11. Analog-to-Digital Converter Block Diagram
Operation
The ADC converts the analog input, ANAX, to a 10-bit digital representation. The equa-
tion for calculating the digital value is represented by:
ADCOutput = 1024 ï´ ï¨ANAx ï¸ VREFï©
Assuming zero gain and offset errors, any voltage outside the ADC input limits of AVSS
and VREF returns all 0s or 1s, respectively. A new conversion can be initiated by a soft-
ware to the ADC Control Registerâs start bit.
Initiating a new conversion, stops any conversion currently in progress and begins a new
conversion. To avoid disrupting a conversion already in progress, the START bit can be
read to determine ADC operation status (busy or available).
PS025113-1212
Operation
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