Hitachi H8/326 Series, Hardware Manual

Page: 220 / 328

9.1.3 Input Pins
Table 9-1 lists the input pins used by the A/D converter module.
The eight analog input pins are divided into two groups, consisting of analog inputs 0 to 3 (AN
0
to
AN
3
) and analog inputs 4 to 7 (AN
4
to AN
7
), respectively.
Table 9-1. A/D Input Pins
Name Abbreviation I/O Function
Analog supply voltage AV
CC
Input Power supply and reference voltage for the
analog circuits.
Analog ground AV
SS
Input Ground and reference voltage for the
analog circuits.
Analog input 0 AN
0
Input
Analog input 1 AN
1
Input Analog input pins, group 0
Analog input 2 AN
2
Input
Analog input 3 AN
3
Input
Analog input 4 AN
4
Input
Analog input 5 AN
5
Input Analog input pins, group 1
Analog input 6 AN
6
Input
Analog input 7 AN
7
Input
A/D external trigger ADTRG Input External trigger for starting A/D conversion
9.1.4 Register Configuration
Table 9-2 lists the registers of the A/D converter module.
Table 9-2. A/D Registers
Name Abbreviation R/W Initial value Address
A/D data register A ADDRA R H'00 H'FFE0
A/D data register B ADDRB R H'00 H'FFE2
A/D data register C ADDRC R H'00 H'FFE4
A/D data register D ADDRD R H'00 H'FFE6
A/D control/status register ADCSR R/(W)* H'00 H'FFE8
A/D control register ADCR R/W H'7E H'FFEA
Note: * Software can write a “0” to clear bit 7, but cannot write a “1” in this bit.
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