STM32F401XD datasheet(113/135 Pages) STMICROELECTRONICS

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STM32F401xD STM32F401xE

Electrical characteristics

114

6.3.24

SD/SDIO MMC card host interface (SDIO) characteristics

Unless otherwise specified, the parameters given in Table 77 for the SDIO/MMC interface

are derived from tests performed under the ambient temperature, fPCLK2 frequency and VDD

supply voltage conditions summarized in Table 14, with the following configuration:

•

Output speed is set to OSPEEDRy[1:0] = 10

•

Capacitive load C = 30 pF

•

Measurement points are done at CMOS levels: 0.5VDD

Refer to Section 6.3.16: I/O port characteristics for more details on the input/output

characteristics.

Figure 44. SDIO high-speed mode

TCoeff(2)

Temperature coefficient

ppm/°C

tSTART(2)

Startup time

µs

1. Shortest sampling time can be determined in the application by multiple iterations.

2. Guaranteed by design, not tested in production

Table 75. Embedded internal reference voltage (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Table 76. Internal reference voltage calibration values

Symbol

Parameter

Memory address

VREFIN_CAL

Raw data acquired at temperature of

30 °C VDDA = 3.3 V

0x1FFF 7A2A - 0x1FFF 7A2B

tW(CKH)

D, CMD

(output)

D, CMD

(input)

tW(CKL)

tOV

tOH

tISU

tIH

ai14887

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