Datasheet

Table Of Contents
Section 16 A/D Converter
REJ09B0140-0900 Rev. 9.00 Page 603 of 846
Sep 16, 2010
H8S/2215 Group
16.2 Input/Output Pins
Table 16.1 summarizes the input pins used by the A/D converter. The AN0 to AN3 and AN14 to
AN15 pins are analog input pins. The AVCC and AVSS pins are the power supply pins for the
analog block in the A/D converter. The Vref pin is the reference voltage pin for the A/D
conversion.
Table 16.1 Pin Configuration
Pin Name Symbol I/O Function
Analog power supply pin AVCC Input Analog block power supply and
reference voltage
Analog ground pin AVSS Input Analog block ground and reference
voltage
Analog reference voltage pin Vref Input Reference voltage pin for the A/D
Analog input pin 0 AN0* Input Analog input pins
Analog input pin 1 AN1* Input
Analog input pin 2 AN2 Input
Analog input pin 3 AN3 Input
Analog input pin 14 AN14 Input
Analog input pin 15 AN15 Input
A/D external trigger input pin ADTRG Input External trigger input pin for starting A/D
conversion
Note: * AN0 and AN1 can be used only when Vcc = AVcc.
16.3 Register Descriptions
The A/D converter has the following registers.
A/D data register A (ADDRA)
A/D data register B (ADDRB)
A/D data register C (ADDRC)
A/D data register D (ADDRD)
A/D control/status register (ADCSR)
A/D control register (ADCR)