Datasheet

Section 17 A/D Converter
Rev. 6.00 Mar. 18, 2010 Page 691 of 982
REJ09B0054-0600
17.2 Input/Output Pins
Table 17.1 summarizes the input pins used by the A/D converter. The eight analog input pins are
divided into two groups each of which consists of four channels; analog input pins 0 to 3 (AN0 to
AN3) comprising group 0 and analog input pins 4 to 7 (AN4 to AN7) comprising group 1. The
AVcc and AVss pins are the power supply pins for the analog block in the A/D converter. The
Vref pin is the A/D conversion reference voltage pin.
Table 17.1 Pin Configuration
Pin Name Symbol I/O Function
Analog power supply pin AV
CC
Input Analog block power supply and reference
voltage
Analog ground pin AV
SS
Input Analog block ground and reference voltage
Reference voltage pin Vref Input Reference voltage for A/D conversion
Analog input pin 0 AN0* Input
Analog input pin 1 AN1* Input
Analog input pin 2 AN2 Input
Analog input pin 3 AN3 Input
Group 0 analog input pins
Analog input pin 4 AN4 Input
Analog input pin 5 AN5 Input
Analog input pin 6 AN6 Input
Analog input pin 7 AN7 Input
Group 1 analog input pins
A/D external trigger input pin ADTRG Input External trigger input pin for starting A/D
conversion
Note: * In the case of the H8S/2239 Group, H8S/2227 Group, H8S/2238R, and H8S/2236R,
AN0 and AN1 may be used only when Vcc = AVcc.