C508_01 Datasheet, PDF (189/267 Pages) Infineon Technologies AG – 8-Bit CMOS Microcontroller

C508
On-Chip Peripheral Components
6.5.2 A/D Converter Registers
This section describes the bits/functions of all registers which are used by the A/D
Converter.
Special Function Register ADDATH (Address D9_H)
Special Function Register ADDATL (Address DA_H)
Reset Value: 00_H
Reset Value: 00XXXXXX_B
Bit No. MSB
LSB
7
6
5
4
3
2
1
0
D9_H
MSB
.9
.8
.7
.6
.5
.4
.3
.2 ADDATH
DA_H
.1
LSB
.0
–
–
–
–
–
– ADDATL
The registers ADDATH and ADDATL hold the 10-bit conversion result in left justified
data format. The most significant bit of the 10-bit conversion result is bit 7 of ADDATH.
The least significant bit of the 10-bit conversion result is bit 6 of ADDATL. To get a 10-bit
conversion result, both ADDAT registers must be read. If an 8-bit conversion result is
required, only the reading of ADDATH is necessary. The data remains in ADDAT until it
is overwritten by the next converted data. ADDAT can be read or written under software
control. lf the A/D Converter of the C508 is not used, register ADDATH can be used as
an additional general purpose register.
User’s Manual
6-124
2001-05