BCM4354 Data Sheet
SDIO Timing
Table 56: SDIO Bus Output Timing Parameters (SDR Modes 100 MHz to 208 MHz)
Symbol
tOP
Minimum
0
Maximum
Unit
UI
Comments
2
Card output phase
∆tOP
–350
0.60
+1550
–
ps
Delay variation due to temp change after tuning
tODW=2.88 ns @208 MHz
tODW
UI
•
•
•
∆tOP = +1550 ps for junction temperature of ∆tOP = 90 degrees during operation
∆tOP = –350 ps for junction temperature of ∆tOP = –20 degrees during operation
∆tOP = +2600 ps for junction temperature of ∆tOP = –20 to +125 degrees during operation
Figure 43: ∆tOP Consideration for Variable Data Window (SDR 104 Mode)
Data valid window
Sampling point after tuning
ȴtOP
1550 ps
=
Data valid window
ȴtOP
350 ps
=
Sampling point after card junction heating
by +90°C from tuning temperature
Data valid window
Sampling point after card junction cooling
by 20°C from tuning temperature
Broadcom®
October 15, 2014 • 4354-DS109-R
Page 173
BROADCOM CONFIDENTIAL
CYPRESS [ CYPRESS ]
