MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 235
MCBSTM32EXL
Manufacturer Part Number
MCBSTM32EXL
Description
BOARD EVALUATION FOR STM32F103ZE
Manufacturer
Keil
Specifications of MCBSTM32EXL
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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RM0008
12.3
12.3.1
Note:
12.3.2
12.3.3
DAC functional description
DAC channel enable
Each DAC channel can be powered on by setting its corresponding ENx bit in the DAC_CR
register. The DAC channel is then enabled after a startup time t
The ENx bit enables the analog DAC Channelx macrocell only. The DAC Channelx digital
interface is enabled even if the ENx bit is reset.
DAC output buffer enable
The DAC integrates two output buffers that can be used to reduce the output impedance,
and to drive external loads directly without having to add an external operational amplifier.
Each DAC channel output buffer can be enabled and disabled using the corresponding
BOFFx bit in the DAC_CR register.
DAC data format
Depending on the selected configuration mode, the data has to be written in the specified
register as described below:
●
Depending on the loaded DAC_DHRyyyx register, the data written by the user will be shifted
and stored into the DHRx (Data Holding Registerx, that are internal non-memory-mapped
registers). The DHRx register will then be loaded into the DORx register either
automatically, by software trigger or by an external event trigger.
Single DAC channelx, there are three possibilities:
–
–
–
8-bit right alignment: user has to load data into DAC_DHR8Rx [7:0] bits (stored
into DHRx[11:4] bits)
12-bit left alignment: user has to load data into DAC_DHR12Lx [15:4] bits (stored
into DHRx[11:0] bits)
12-bit right alignment: user has to load data into DAC_DHR12Rx [11:0] bits
(stored into DHRx[11:0] bits)
Doc ID 13902 Rev 9
Digital-to-analog converter (DAC)
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