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18.3 Register
Descriptions
The A/D converter has the following registers.
•
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 data register E (ADDRE)
•
A/D data register F (ADDRF)
•
A/D data register G (ADDRG)
•
A/D data register H (ADDRH)
•
A/D control/status register (ADCSR)
•
A/D control register (ADCR)
18.3.1
A/D Data Registers A to H (ADDRA to ADDRH)
There are eight 16-bit read-only ADDR registers, ADDRA to ADDRH, used to store the results of
A/D conversion. ADDR, which store a conversion result for each channel, are shown in table 18.2.
The converted 10-bit data is stored in bits 15 to 6. The lower 6-bit data is always read as 0.
The data bus between the CPU and the A/D converter is 16-bit width. ADDR can be read directly
from the CPU.
Table 18.2 Analog Input Channels and Corresponding ADDR
Analog Input Channel
Channel Set 0 (CH3 = 0)
Channel Set 1 (CH3 = 1)
A/D Data Register which Stores
Conversion Result
AN0 AN8 ADDRA
AN1 AN9 ADDRB
AN2 AN10
ADDRC
AN3 AN11
ADDRD
AN4 AN12
ADDRE
AN5 AN13
ADDRF
AN6 AN14
ADDRG
AN7 AN15
ADDRH
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