Section 15 A/D Converter
Rev. 3.00 Mar. 14, 2006 Page 547 of 804
REJ09B0104-0300
Section 15 A/D Converter
This LSI includes two units (unit 0 and unit 1) of successive approximation type 10-bit A/D
converters that allow up to 16 analog input channels to be selected.
Figures 15.1 and 15.2 are block diagrams for unit 0 and unit 1, respectively.
This section describes unit 0, which has the same functions as the other unit.
15.1 Features
•
10-bit resolution
•
16 input channels (eight channels for unit 0 and eight channels for unit 1)
•
Conversion time: 7.4
µ
s per channel (at 35-MHz operation)
•
Two kinds of operating modes
Single mode: Single-channel A/D conversion
Scan mode: Continuous A/D conversion on 1 to 4 channels, or 1 to 8 channels
•
16 data registers (eight registers for unit 0 and eight registers for unit 1)
A/D conversion results are held in a 16-bit data register for each channel
•
Sample and hold function
•
Three types of conversion start
Conversion can be started by software, a conversion start trigger by the 16-bit timer pulse unit
(TPU), or an external trigger signal.
•
Interrupt source
A/D conversion end interrupt (ADI) request can be generated.
•
Module stop mode can be set
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