BCM4339 Preliminary Data Sheet
SDIO/gSPI Timing
Table 57: 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 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 49: ∆tOP Consideration for Variable Data Window (SDR 104 Mode)
Data valid window
Sampling point after tuning
ȴtOP
=
Data valid window
1550 ps
ȴtOP
=
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 17, 2014 • 4339-DS106-R
Page 165
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