STM32F479II datasheet(161/208 Pages) STMICROELECTRONICS

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STM32F479xx

Electrical characteristics

187

Figure 56. 12-bit buffered/non-buffered DAC

1. The DAC integrates an output buffer that can be used to reduce the output impedance and to drive external

loads directly without the use of an external operational amplifier. The buffer can be bypassed by

configuring the BOFFx bit in the DAC_CR register.

5.3.29

FMC characteristics

Unless otherwise specified, the parameters given in Tables 89 through 102 for the FMC

interface are derived from tests performed under the ambient temperature, fHCLK frequency

and VDD supply voltage conditions summarized in Table 17, with the following configuration:

•

Output speed is set to OSPEEDRy[1:0] = 11

•

Measurement points are done at CMOS levels: 0.5 VDD

Refer to Section 5.3.20 for more details on the input/output characteristics.

Asynchronous waveforms and timings

Figures 57 through 60 represent asynchronous waveforms, and Tables 89 through 96

provide the corresponding timings. The results shown in these tables are obtained with the

following FMC configuration:

•

AddressSetupTime = 0x1

•

AddressHoldTime = 0x1

•

DataSetupTime = 0x1 (except for asynchronous NWAIT mode , DataSetupTime = 0x5)

•

BusTurnAroundDuration = 0x0

•

Capacitive load CL = 30 pF

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