BCM4339XKWBGT Datasheet, PDF (167/183 Pages) Cypress Semiconductor – Single-Chip 5G WiFi IEEE 802.11ac MAC/Baseband/Radio with Integrated Bluetooth 4.1 and FM Receiver

BCM4339 Preliminary Data Sheet
SDIO Bus Timing Specifications in DDR50 Mode
Figure 50: SDIO Clock Timing (DDR50 Mode)
t_CLK
SDIO/gSPI Timing
SDIO_CLK
t_CR
t_CF
t_CR
Parameter
–
–
Clock duty
cycle
Table 58: SDIO Bus Clock Timing Parameters (DDR50 Mode)
Symbol
t_CLK
t_CR,t_CF
–
Minimum
20
–
45
Maximum Unit
–
ns
0.2 × tCLK ns
55
%
Comments
DDR50 mode
t_CR, t_CF < 4.00 ns (max) @50 MHz,
C_CARD = 10 pF
–
Broadcom^®
November 17, 2014 • 4339-DS106-R
Page 166