CHAPTER 10 8-BIT A/D CONVERTER (µPD789426 AND 789446 SUBSERIES)
10.1 8-Bit A/D Converter Functions
The 8-bit A/D converter is an 8-bit resolution converter used to convert analog inputs into digital signals. This
converter can control six channels (ANI0 to ANI5) of analog inputs.
A/D conversion can only be started by software.
One of analog inputs ANI0 to ANI5 is selected for A/D conversion. A/D conversion is performed repeatedly, with
an interrupt request (INTAD0) being issued each time A/D conversion is complete.
10.2 8-Bit A/D Converter Configuration
The 8-bit A/D converter includes the following hardware.
Table 10-1. Configuration of 8-Bit A/D Converter
Item
Analog inputs
Registers
Configuration
6 channels (ANI0 to ANI5)
Successive approximation register (SAR)
A/D conversion result register 0 (ADCR0)
Control registers
A/D converter mode register 0 (ADM0)
Analog input channel specification register 0 (ADS0)
User’s Manual U15075EJ1V0UM00
183
NEC [ NEC ]
