SAH-C515 SIEMENS [Siemens Semiconductor Group], SAH-C515 Datasheet - Page 102

• Manufacturer Part Number: SAH-C515
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

6.4.2 A/D Converter Registers
This section describes the bits/functions of the registers which are used by the A/D converter.
6.4.2.1
Special function register ADCON which is is used to set the operating modes, to check the status,
and to select one of eight analog input channels.
Special Function Register ADCON (Address D8 H ) )
Bit
BSY
ADM
MX2 - MX0
Semiconductor Group
– ADCON (A/D converter control register)
– ADDAT (A/D converter data register)
– IEN1 and IRCON (A/D converter Interrupt control bits)
– DAPR (D/A converter program register) for the programmable reference voltages.
D8 H
Bit No. MSB
A/D Converter Control Register ADCON
BD
7
The shaded bits are not used for A/D converter control.
Function
Busy flag
This flag indicates whether a conversion is in progress (BSY = 1). The flag is
set by hardware during an A/D conversion and cleared by hardware when the
conversion is completed.
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 after current conversion process is
completed.
Bits MX2-0 are used for selection of the analog input channels.The analog
inputs are selected according to the following table :
A/D converter input channel select bits
MX2
0
0
0
0
1
1
1
1
CLK
6
MX1
0
0
1
1
0
0
1
1
5
–
BSY
MX0
4
0
1
0
1
0
1
0
1
6-59
ADM
P6.0 / AIN0
P6.1 / AIN1
P6.2 / AIN2
P6.3 / AIN3
P6.4 / AIN4
P6.5 / AIN5
P6.6 / AIN6
P6.7 / AIN7
Selected Analog Input
3
On-Chip Peripheral Components
MX2
2
MX1
1
Reset Value : 00X00000 B
LSB
MX0
0
ADCON
C515