BCM43455 Preliminary Data Sheet
SDIO Timing
Table 58: SDIO Bus Output Timing Parameters (SDR Modes 100 MHz to 208 MHz)
Symbol
Minimum
Maximum
Unit
Comments
tOP
0
2
UI
ps
UI
Card output phase
∆tOP
tODW
–350
0.60
+1550
–
Delay variation due to temp change after tuning
tODW = 2.88 ns @ 208 MHz
•
•
•
∆tOP = +1550 ps for junction temperature of ∆tOP = 90°C during operation.
∆tOP = –350 ps for junction temperature of ∆tOP = –20°C during operation.
∆tOP = +2600 ps for junction temperature of ∆tOP = –20°C to +125°C during operation.
Figure 40: ∆t Consideration for Variable Data Window (SDR 104 Mode)
OP
Data valid window
Sampling point after tuning
ǻtOP
=
Data valid window
1550 ps
ǻtOP
=
Sampling point after card junction heating
by +90°C from tuning temperature
–350 ps
Data valid window
Sampling point after card junction cooling
by –20°C from tuning temperature
Broadcom®
November 5, 2015 • 43455-DS109-R
Page 145
BROADCOM CONFIDENTIAL
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