HD6473847RHV Datasheet, PDF (347/546 Pages) Renesas Technology Corp – Renesas 8-Bit Single-Chip Microcomputer H8 Family / H8/300L Super Low Power Series

Section 12 A/D Converter
12.2 Input/Output Pins
Table 12.1 shows the input pins used by the A/D converter.
Table 12.1 Pin Configuration
Pin Name
Abbreviation
Analog power supply pin AVcc
I/O
Input
Analog ground pin
AVss
Input
Analog input pin 0
AN0
Analog input pin 1
AN1
Analog input pin 2
AN2
Analog input pin 3
AN3
Input
Input
Input
Input
Function
Power supply and reference voltage of
analog part
Ground and reference voltage of analog
part
Analog input pins
12.3 Register Descriptions
The A/D converter has the following registers.
• A/D result registers H and L (ADRRH and ADRRL)
• A/D mode register (AMR)
• A/D start register (ADSR)
12.3.1 A/D Result Registers H and L (ADRRH and ADRRL)
ADRRH and ADRRL are 16-bit read-only registers that store the results of A/D conversion.
The upper 8 bits of the data are stored in ADRRH, and the lower 2 bits in ADRRL.
ADRRH and ADRRL can be read by the CPU at any time, but the ADRRH and ADRRL values
during A/D conversion are undefined. After A/D conversion is completed, the conversion result is
stored as 10-bit data, and this data is retained until the next conversion operation starts.
The initial values of ADRRH and ADRRL are undefined.
Rev. 7.00 Mar. 08, 2010 Page 315 of 510
REJ09B0024-0700