Datasheet

Section 19 A/D Converter
R01UH0166EJ0600 Rev. 6.00 Page 907 of 1434
Mar 02, 2011
H8S/2633 Group, H8S/2633 F-ZTAT
TM
,
H8S/2633R F-ZTAT
TM
, H8S/2695
19.2 Register Descriptions
19.2.1 A/D Data Registers A to D (ADDRA to ADDRD)
15
AD9
0
R
Bit
Initial value
R/W
:
:
:
14
AD8
0
R
13
AD7
0
R
12
AD6
0
R
11
AD5
0
R
10
AD4
0
R
9
AD3
0
R
8
AD2
0
R
7
AD1
0
R
6
AD0
0
R
5
—
0
R
4
—
0
R
3
—
0
R
2
—
0
R
1
—
0
R
0
—
0
R
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 19.3.
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 19.3,
Interface to Bus Master.
The ADDR registers are initialized to H'0000 by a reset, and in standby mode or module stop
mode.
Table 19.3 Analog Input Channels and Corresponding ADDR Registers
Analog Input Channel
Channel Set 0 (CH3 = 0) Channel Set 1 (CH3 = 1)
Group 0 Group 1 Group 0 Group 1 A/D Data Register
AN0 AN4 AN8 AN12 ADDRA
AN1 AN5 AN9 AN13 ADDRB
AN2 AN6 AN10 AN14 ADDRC
AN3 AN7 AN11 AN15 ADDRD