z8f1601 ZiLOG Semiconductor, z8f1601 Datasheet - Page 151

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z8f1601

Manufacturer Part Number
z8f1601
Description
Z8 Encore!? Microcontroller With Flash Memory And 10-bit A/d Converter
Manufacturer
ZiLOG Semiconductor
Datasheet

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Operation
PS017609-0803
Automatic Power-Down
Single-Shot Conversion
Figure 83. Analog-to-Digital Converter Block Diagram
If the ADC is idle (no conversions in progress) for 160 consecutive system clock cycles,
portions of the ADC are automatically powered-down. From this power-down state, the
ADC requires 40 system clock cycles to power-up. The ADC powers up when a conver-
sion is requested using the ADC Control register.
When configured for single-shot conversion, the ADC performs a single analog-to-digital
conversion on the selected analog input channel. After completion of the conversion, the
ADC shuts down. The steps for setting up the ADC and initiating a single-shot conversion
are as follows:
Reference Generator
Analog-to-Digital
Internal Voltage
Reference Input
Converter
Analog Input
Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
Analog Input
ANAIN[3:0]
Multiplexer
Analog-to-Digital Converter
ANA0
ANA1
ANA2
ANA3
ANA4
ANA5
ANA6
ANA7
ANA8
ANA9
ANA10
ANA11
VREF
Z8 Encore!
®
133

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