Section 15 A/D Converter
Rev. 3.00 Mar. 14, 2006 Page 552 of 804
REJ09B0104-0300
15.3.1
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. The ADDR registers, which store a conversion result for each channel, are shown
in table 15.2.
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 has a 16-bit width. The data can be read
directly from the CPU. ADDR must not be accessed in 8-bit units and must be accessed in 16-bit
units.
15
0
R
14
0
R
13
0
R
12
0
R
11
0
R
10
0
R
9
0
R
8
0
R
7
0
R
6
0
R
5
—
0
R
4
—
0
R
3
—
0
R
2
—
0
R
1
—
0
R
0
—
0
R
Bit
Bit Name
Initial Value
R/W
Table 15.2 Analog Input Channels and Corresponding ADDR Registers
Analog Input Channel
A/D Data Register Which Stores Conversion Result
AN0 ADDRA
AN1 ADDRB
AN2 ADDRC
AN3 ADDRD
AN4 ADDRE
AN5 ADDRF
AN6 ADDRG
AN7 ADDRH
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