PRELIMINARY
CYW43340
Figure 21. Signal Connections to SDIO Host (SD 1-Bit Mode)
CLK
CMD
DATA
SD Host
CYW43340
IRQ
RW
Figure 22. SDIO Pull-Up Requirements
VDDIO_SD
47k
47k
(see note)
(see note)
CLK
CMD
SD Host
CYW43340
DATA[3:0]
Note: Per Section 6 of the SDIO specification, 10 to 100 kohm pull-ups are required on the four DATA lines and the CMD line. This
requirement must be met during all operating states by using external pull-up resistors or properly programming internal SDIO
Host pull-ups. The CYW43340 does not have internal pull-ups on these lines.
Document Number: 002-14943 Rev. *L
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