HD6475328-CP10 HITACHI [Hitachi Semiconductor], HD6475328-CP10 Datasheet - Page 290
HD6475328-CP10
Manufacturer Part Number
HD6475328-CP10
Description
original Hitachi CMOS microcomputer unit (MCU)
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet
1.HD6475328-CP10.pdf
(459 pages)
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Bit
ADDRn H
Initial value
Read/Write
Bit
ADDRn H
Initial value
Read/Write
15.2 Register Descriptions
15.2.1 A/D Data Registers (ADDR)—H'FFE0 to H'FFE7
The four A/D data registers (ADDRA to ADDRD) are 16-bit read-only registers that store the
results of A/D conversion.
Each result consist of 10 bits. The first 8 bits are stored in the upper byte of the data register
corresponding to the selected channel. The last two bits are stored in the lower data register byte.
Each data register is assigned to two analog input channels as indicated in table 15-3.
The A/D data registers are always readable by the CPU. The upper byte can be read directly. The
lower byte is read via a temporary register. See section 15-3, “CPU Interface” for details.
The unused bits (bits 5 to 0) of the lower data register byte are always read as 0.
The A/D data registers are initialized to H'0000 at a reset and in the standby modes.
Table 15-3 Assignment of Data Registers to Analog Input Channels
Analog Input Channel
Group 0
AN
AN
AN
AN
0
1
2
3
Group 1
AN
AN
AN
AN
4
5
6
7
AD
AD
R
R
7
0
7
0
9
1
A/D Data Register
ADDRA
ADDRB
ADDRC
ADDRD
AD
AD
R
R
6
0
6
0
8
0
AD
—
R
R
5
0
5
0
7
276
AD
—
R
R
4
0
4
0
6
AD
—
R
R
3
0
3
0
5
AD
—
R
R
2
0
2
0
4
(n = A to D)
(n = A to D)
AD
—
R
R
1
0
1
0
3
AD
—
R
R
0
0
0
0
2
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