C509-L_97 SIEMENS [Siemens Semiconductor Group], C509-L_97 Datasheet - Page 186
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C509-L_97
Manufacturer Part Number
C509-L_97
Description
8-Bit CMOS Microcontroller
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet
1.C509-L_97.pdf
(290 pages)
- Current page: 186 of 290
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Special Function Registers ADCON0 (Address D8 H )
Special Function Registers ADCON1 (Address DC H )
Bit
ADEX
BSY
ADM
MX3 - MX0
Semiconductor Group
DC H
D8 H
Bit No. MSB
The shaded bits are not used for A/D converter control.
ADCL1
BD
7
Function
Internal / external start of A/D conversion
When set, the external start of an A/D conversion at pin P6.0/ADST is enabled.
Busy flag
This flag indicates whether a conversion is in progress (BSY = 1). The flag is
cleared by hardware when the conversion is finished.
A/D conversion mode
When set, a continuous A/D conversion is selected. If cleared during a running
A/D conversion, the conversion is stopped at its end.
A/D converter input channel select bits
Bits MX3-0 can be written or read either in ADCON0 or ADCON1. When writing
to ADCON1, the ADCON0 bits MX2-0 are overwritten. Writing ADCON0, only
MX2-0 are affected.
The analog inputs are selected according the following table:
MX3
ADCL0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
CLK
6
MX2
ADST1 ADST0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
ADEX
5
MX1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
BSY
4
6-108
MX0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
ADM
MX3
3
On-Chip Peripheral Components
Selected Analog Input
P7.0 / AN0
P7.1 / AN1
P7.2 / AN2
P7.3 / AN3
P7.2 / AN4
P7.3 / AN5
P7.4 / AN6
P7.5 / AN7
P8.0 / AN8
P8.1 / AN9
P8.2 / AN10
P8.3 / AN11
P8.4 / AN12
P8.5 / AN13
P8.6 / AN14
MX2
MX2
2
MX1
MX1
1
Reset Value : 01000000 B
LSB
MX0
MX0
0
Reset Value : 00 H
ADCON0
ADCON1
1997-10-01
C509-L
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