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S3C8248/C8245/P8245/C8247/C8249/P8249
INTERNAL REFERENCE VOLTAGE LEVELS
In the ADC function block, the analog input voltage level is compared to the reference voltage. The analog input
level must remain within the range AV
Different reference voltage levels are generated internally along the resistor tree during the analog conversion
process for each conversion step. The reference voltage level for the first conversion bit is always 1/2 AV
Conversion Data Register (High Byte) ADDATAH
F8H, Set 1, Bank 1, Read Only
MSB
.7
.6
.5
Conversion Data Register (Low Byte) ADDATAL
F9H, Set 1, Bank 1, Read Only
MSB
Figure 15-2. A/D Converter Data Register (ADDATAH/L)
to AV
SS
REF
.4
.3
.2
.1
.1
(usually, AV
= V
REF
DD
A/D CONVERTER
.0
LSB
.0
LSB
).
.
REF
15-3
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