HD6433682 ETC, HD6433682 Datasheet - Page 350

• Manufacturer Part Number: HD6433682
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series
• Manufacturer: ETC

18.3
The A/D converter has the following registers.
18.3.1
There are four 16-bit read-only ADDR registers; ADDRA to ADDRD, used to store the results of
A/D conversion. The ADDR registers, which store a conversion result for each analog input
channel, are shown in table 18.2.
The converted 10-bit data is stored in bits 15 to 6. The lower 6 bits are always read as 0.
The data bus width between the CPU and the A/D converter is 8 bits. 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 ADDR, read the upper bytes only or read in word units. ADDR is initialized to
H'0000.
Table 18.2 Analog Input Channels and Corresponding ADDR Registers
Rev. 3.00, 05/03, page 320 of 472
Group 0
AN0
AN1
AN2
AN3
Analog Input Channel
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)
Register Descriptions
A/D Data Registers A to D (ADDRA to ADDRD)
Group 1
AN4
AN5
AN6
AN7
A/D Data Register to Be Stored Results of A/D Conversion
ADDRA
ADDRB
ADDRC
ADDRD