AN4541 datasheet(11/21 Pages) STMICROELECTRONICS

Part #	AN4541

Description	high-speed SD card protection and filtering devices

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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DocID026513 Rev 1

11/21

AN4541

SD3.0 constrains

21

Figure 14. Data rate evaluation on the SD3.0 tested link

The approximate 80 MB/s data rate in read and write mode is close to the specified value.

Figure 15 shows the clock signal for measuring the rise and fall times. tR and tF are

measured between 0.58 V and 1.27 V (VIL max and VIH min corresponding to VDD supply

voltage): tR and tF are lower than 0.96 ns, the specified maximum value in the SD3.0

standard.

Figure 15. Clock signal on the SD3.0 tested link

To facilitate the testing of the protection device, an interface board is inserted between the

card and the host (Figure 16).

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