BCM88335 Data Sheet
SDIO/gSPI Timing
SDIO Bus Timing Specifications in DDR50 Mode
Figure 41: SDIO Clock Timing (DDR50 Mode)
tCLK
SDIO_CLK
tCR
tCF
tCR
Table 50: SDIO Bus Clock Timing Parameters (DDR50 Mode)
Parameter
Symbol
Minimum
Maximum
Unit
Comments
–
–
tCLK
20
–
–
ns
ns
DDR50 mode
t
CR,tCF
0.2 × tCLK
tCR, tCF < 4.00 ns (max) @50 MHz,
CCARD = 10 pF
Clock duty
cycle
–
45
55
%
–
Broadcom®
September 23, 2015 • 88335-DS100-R
Page 128
BROADCOM CONFIDENTIAL