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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
Содержание H8S/2437
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