STM32F479AI datasheet(181/208 Pages) STMICROELECTRONICS

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STM32F479xx

Electrical characteristics

187

5.3.30

Quad-SPI interface characteristics

Unless otherwise specified, the parameters given in Table 107 and Table 108 for Quad-SPI

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

supply voltage conditions summarized in Table xx, 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 alternate function

characteristics.

Figure 71. Quad-SPI SDR timing diagram

Table 107. Quad-SPI characteristics in SDR mode(1)

Symbol

Parameter

Test conditions

Min

Typ

Max

Unit

Fck

1/t(CK)

Quad-SPI clock frequency

2.7 V ≤ VDD ≤ 3.6 V, CL = 20 pF

MHz

1.71 V ≤ VDD ≤ 3.6 V, CL = 15 pF

tw(CKH)

Quad-SPI clock high time

‐

t(CK)/2-1

t(CK)/2

tw(CKL)

Quad-SPI clock low time

‐

t(CK)/2

t(CK)/2+1

ts(IN)

Data input set-up time

‐

0.5

th(IN)

Data input hold time

‐

tv(OUT)

Data output valid time

‐

-3

th(OUT)

Data output hold time

‐

2.5

1. Guaranteed based on test during characterization.

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