MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 207

• Manufacturer Part Number: MCBSTM32EXL
• Description: BOARD EVALUATION FOR STM32F103ZE
• Manufacturer: Keil

Specifications of MCBSTM32EXL

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RM0008
11.6
11.7
Note:
Figure 30. Right alignment of data
Figure 31. Left alignment of data
Channel-by-channel programmable sample time
ADC samples the input voltage for a number of ADC_CLK cycles which can be modified us-
ing the SMP[2:0] bits in the ADC_SMPR1 and ADC_SMPR2 registers. Each channel can be
sampled with a different sample time.
The total conversion time is calculated as follows:
Example:
Conversion on external trigger
Conversion can be triggered by an external event (e.g. timer capture, EXTI line). If the EXT-
TRIG control bit is set then external events are able to trigger a conversion. The EXT-
SEL[2:0] and JEXTSEL[2:0] control bits allow the application to select decide which out of 8
possible events can trigger conversion for the regular and injected groups.
When an external trigger is selected for ADC regular or injected conversion, only the rising
edge of the signal can start the conversion.
Regular group
Injected group
Regular group
Injected group
SEXT
SEXT
0
D11
Tconv = Sampling time + 12.5 cycles
With an ADCCLK = 14 MHz and a sampling time of 1.5 cycles:
Tconv = 1.5 + 12.5 = 14 cycles = 1µs
SEXT
D10
0
D11
SEXT
D9
0
D10
SEXT
D8
0
D9
D11
D11
D7
D8
Doc ID 13902 Rev 9
D10
D10
D6
D7
D9
D9
D5
D6
D8
D8
D4
D5
D7
D7
D3
D4
D6
D6
D2
Analog-to-digital converter (ADC)
D3
D5
D5
D1
D2
D4
D4
D0
D1
D3
D3
D0
0
D2
D2
0
0
D1
D1
0
0
207/995
D0
D0
0
0