HD6432670 Hitachi, HD6432670 Datasheet - Page 755

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

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
ADCMS01A_010020020400
10-bit resolution
Twelve input channels
Conversion time: 6.7 µs per channel (at 20 MHz operation)
Two kinds of operating modes
Four data registers (H8S/2678 Series) or eight data registers (H8S/2678R Series)
Sample and hold function
Three kinds of conversion start
Interrupt request
Module stop mode can be set
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
Series)
Conversion results are held in a 16-bit data register for each channel
Conversion can be started by software, 16-bit timer pulse unit (TPU), conversion start
trigger by 8-bit timer (TMR), or external trigger signal.
A/D conversion end interrupt (ADI) request can be generated
Features
Section 16 A/D Converter
Rev. 2.0, 04/02, page 709 of 906