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15.2
Register Descriptions
15.2.1
A/D Data Registers A–H (ADDRA–ADDRH)
The ADDR are 16-bit read only registers for storing A/D conversion results. There are eight of
these registers, ADDRA through ADDRH.
The A/D converted data is 10-bit data which is sent to the ADDR for the corresponding converted
channel for storage. The lower 8 bits of the A/D converted data are transferred to and stored in the
lower byte (bits 7–0) of the ADDR, and the upper 2 bits are stored into the upper byte (bits 9, 8).
Bits 15–10 always read as 0. Data reads can be either byte or word. The upper 8 bits of the
converted data are transferred upon byte data reads. Additionally, buffered operation is possible by
combining ADDRA–ADDRD.
Table 15.3 shows the correspondence between the analog input channels and the ADDR.
The ADDR are initialized to H'0000 by power-on reset or in standby mode. Manual reset does not
initialize ADDR.
Bit:
15
14
13
12
11
10
9
8
—
—
—
—
—
—
AD9
AD8
Initial value:
0
0
0
0
0
0
0
0
R
/W:
RRRRRRRR
Bit:
7
6
5
4
3
2
1
0
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
Initial value:
0
0
0
0
0
0
0
0
R
/W:
RRRRRRRR
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