STM32F479XX Datasheet, PDF (184/217 Pages) STMicroelectronics – ARMCortex-M4 32b MCU+FPU, 225DMIPS, up to 2MB Flash/384+4KB RAM, USB OTG HS/FS, Ethernet, FMC, dual Quad-SPI, Crypto, Graphical accelerator, Camera IF, LCD-TFT & MIPI DSI

Electrical characteristics
STM32F479xx
5.3.30 Quad-SPI interface characteristics
Unless otherwise specified, the parameters given in Table 106 and Table 107 for Quad-SPI
are derived from tests performed under the ambient temperature, f_AHB frequency and V_DD
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 V_DD
Refer to Section 5.3.20 for more details on the input/output alternate function
characteristics.
Table 106. Quad-SPI characteristics in SDR mode⁽¹⁾
Symbol
Parameter
Test conditions
Min
Typ
F_ck
1/t_(CK)
Quad-SPI clock frequency
2.7 V ≤ V_DD ≤ 3.6 V, C_L = 20 pF
1.71 V ≤ V_DD ≤ 3.6 V, C_L = 15 pF
-
-
-
-
t_w(CKH) Quad-SPI clock high time
‐
t_(CK)/2-1
-
t_w(CKL) Quad-SPI clock low time
‐
t_(CK)/2
-
t_s(IN)
Data input set-up time
‐
0.5
-
t_h(IN)
Data input hold time
‐
3
-
t_v(OUT)
Data output valid time
‐
-
3
t_h(OUT)
Data output hold time
‐
2.5
-
1. Guaranteed based on test during characterization.
Max Unit
90
MHz
84
t_(CK)/2
t_(CK)/2+1
-
ns
-
4
-
Figure 73. Quad-SPI SDR timing diagram
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