C515 Datasheet, PDF (33/55 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

C515
IEN1 (B8H)
EXEN2 SWDT EX6 EX5 EX4 EX3 ECAN EADC
IRCON (C0H)
EXF2 TF2 IEX6 IEX5 IEX4 IEX3 0 IADC
ADCON (D8H)
BD CLK ^_ BSY ADM MX2 MX1 MX0
Internal
Bus
Port 6
f _OSC /2
Write to
DAPR
MUX
S&H
÷4
Conversion Clock f_ADC
Input Clock f _IN
Single/
Continuous
Mode
A/D
Converter
ADDAT
(D9 _H)
LBS
.1
.2
.3
.4
.5
.6
MSB
Start of
Conversion
V_INTAREF V_INTAGND
V_AREF
V_AGND
Internal Reference Voltages
DAPR (DAH)
.7 .6 .5 .4 .3 .2 .1 .0
Programming of
V_INTAREF
Shaded bit locations are not used in ADC-functions.
Programming of
V_INTAGND
Figure 14
A/D Converter Block Diagram
Internal
Bus
MCB03207
Semiconductor Group
33
1997-08-01