SH7108 Datasheet, PDF (367/560 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Section 11 A/D Converter
11.3.1 A/D Data Registers 0 to 19 (ADDR0 to ADDR19)
ADDRs are 16-bit read-only registers. The conversion result for each analog input channel is
stored in ADDR with the corresponding number. (For example, the conversion result of AN4 is
stored in ADDR4.)
The converted 10-bit data is stored in bits 6 to 15. The lower 6 bits are always read as 0.
The data bus between the CPU and the A/D converter is 8 bits wide. The upper byte can be read
directly from the CPU, however the lower byte should be read via a temporary register. The
temporary register contents are transferred from the ADDR when the upper byte data is read.
When reading the ADDR, read the upper byte before the lower byte, or read in word unit. The
initial value of ADDR is H'0000.
Rev.1.00 Sep. 18, 2008 Page 333 of 522
REJ09B0069-0100