Datasheet

Section 16 A/D Converter
Rev. 3.00 Mar 17, 2006 page 741 of 926
REJ09B0283-0300
Section 16 A/D Converter
This LSI includes a successive approximation type 10-bit A/D converter that allows up to twelve
analog input channels to be selected. The block diagram of A/D converter is shown in figure 16.1.
16.1 Features
• 10-bit resolution
• Twelve input channels
• Conversion time: 6.7 µs per channel (at 20-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 (H8S/2678R
Group)
• Four data registers (H8S/2678 Group) or eight data registers (H8S/2678R Group)
 Conversion results are held in a 16-bit data register for each channel
• Sample and hold function
• Three kinds of conversion start
 Conversion can be started by software, 16-bit timer pulse unit (TPU), conversion start
trigger by 8-bit timer (TMR), or external trigger signal.
• Interrupt request
 A/D conversion end interrupt (ADI) request can be generated
• Module stop mode can be set
ADCMS01A_010020020400