h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 629

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

16.2
16.2.1
Bit
Initial value
R/W
There are four 16-bit read-only ADDR registers, ADDRA to ADDRD, used to store the results of
A/D conversion.
The 10-bit data resulting from A/D conversion is transferred to the ADDR register for the selected
channel and stored there. The upper 8 bits of the converted data are transferred to the upper byte
(bits 15 to 8) of ADDR, and the lower 2 bits are transferred to the lower byte (bits 7 and 6) and
stored. Bits 5 to 0 are always read as 0.
The correspondence between the analog input channels and ADDR registers is shown in
table 16.3.
ADDR can always be read by the CPU. The upper byte can be read directly, but for the lower
byte, data transfer is performed via a temporary register (TEMP). For details, see section 16.3,
Interface to Bus Master.
The ADDR registers are initialized to H'0000 by a reset, and in standby mode or module stop
mode.
Table 16.3 Analog Input Channels and Corresponding ADDR Registers
Group 0
AN0
AN1
AN2
AN3
Channel Set 0 (CH3 = 0)
Register Descriptions
A/D Data Registers A to D (ADDRA to ADDRD)
:
:
:
AD9
Group 1
AN4
AN5
AN6
AN7
15
R
0
AD8
14
R
0
Analog Input Channel
AD7
13
R
0
AD6
12
R
0
Group 0
AN8
AN9
AN10
AN11
AD5
11
R
0
Channel Set 1 (CH3 = 1)
AD4
10
R
0
AD3
R
9
0
AD2
R
8
0
Rev. 5.00 Sep 22, 2005 page 603 of 1136
AD1
R
7
0
AD0
R
6
0
—
R
5
0
A/D Data Register
ADDRA
ADDRB
ADDRC
ADDRD
Section 16 A/D Converter
—
R
4
0
—
R
3
0
REJ09B0257-0500
—
R
2
0
—
R
1
0
—
R
0
0