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Section 16 Mid-Speed A/D Converter (A Mask)
16.1
Overview
The mid-speed A/D converter has 10 bit resolution, and can select from a maximum of eight
channels of analog input.
The mid-speed A/D converter is structured by two independent modules (A/D0 and A/D1)
16.1.1
Features
The mid-speed A/D converter has the following features:
•
10-bit resolution
•
Eight input channels (four channels times two)
•
Analog conversion voltage range setting is selectable
Using the standard voltage pin (AVref) as an analog standard voltage (Vref), conversion of
analog input from 0V to Vref (only with SH7041A, SH7043A, and SH7045).
(Connected to AV
CC
internally in the SH7040A, SH7042A, and SH7044.)
•
High speed conversion
Minimum conversion time: per channel
Operation frequency: f
≤
20MHz, CKS=0, 1
6.7µs (20MHz, CKS=1)
Operation frequency: f>20MHz, CKS=0
9.3µs (28.7MHz, CKS=0)
•
Multiple conversion modes
Single mode/scan mode
2 channel simultaneous conversion
•
Three types of conversion start
Software, timer conversion start trigger (MTU), or ADTRG pin can be selected.
•
Eight data registers
Conversion results stored in 16-bit data registers corresponding to each channel.
•
Sample and hold function
•
A/D conversion end interrupt generation
An A/D conversion end interrupt (ADI) can be generated on completion of A/D
conversion.
•
Furthermore, ADI0 (A/D0 interrupt request) can activate DTC and ADI1 (A/D1 interrupt
request) can activate DMAC.
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