BCM43455XKUBGT Datasheet, PDF (70/159 Pages) Cypress Semiconductor – Single-Chip 5G WiFi IEEE 802.11ac MAC/Baseband/ Radio with Integrated Bluetooth 4.1 and FM Receiver

BCM43455 Preliminary Data Sheet
SDIO Pins
DATA0
DATA1
DATA2
DATA3
CLK
CMD
Table 16: SDIO Pin Description
SD 4-Bit Mode
Data line 0
Data line 1 or Interrupt
Data line 2 or Read Wait
Data line 3
Clock
Command line
DATA
IRQ
RW
N/C
CLK
CMD
SD 1-Bit Mode
Data line
Interrupt
Read Wait
Not used
Clock
Command line
Figure 25: Signal Connections to SDIO Host (SD 4-Bit Mode)
SD Host
CLK
CMD
DAT[3:0]
BCM43455
SDIO v3.0
Figure 26: Signal Connections to SDIO Host (SD 1-Bit Mode)
SD Host
CLK
CMD
DATA
IRQ
RW
BCM43455
Note: Per Section 6 of the SDIO specification, pull-ups in the 10 kΩ to 100 kΩ range are required on
the four DATA lines and the CMD line. This requirement must be met during all operating states either
through the use of external pull-up resistors or through proper programming of the SDIO host’s internal
pull-ups.
Broadcom^®
November 5, 2015 • 43455-DS109-R
BROADCOM CONFIDENTIAL
Page 69