USB 2.0 HSIC Hi-Speed 4-Port Hub Controller
Datasheet
Table 9.11 SPI Timing Values (60 MHz Operation)
SYMBOL
DESCRIPTION
MIN
TYP
MAX
UNITS
tfc
tceh
tclq
tdh
Clock frequency
60
MHz
ns
Chip enable (SPI_CE_EN) high time
Clock to input data
50
9
ns
Input data hold time
0
5
ns
tos
Output setup time
ns
toh
tov
tcel
tceh
Output hold time
5
ns
Clock to output valid
4
ns
Chip enable (SPI_CE_EN) low to first clock
Last clock to chip enable (SPI_CE_EN) high
12
12
ns
ns
9.6
Clock Specifications
The device can accept either a 24 MHz crystal or a 24 MHz single-ended clock oscillator input. If the
single-ended clock oscillator method is implemented, XTAL1 should be left unconnected and REFCLK
should be driven with a clock that adheres to the specifications outlined in Section 9.6.2, "External
Reference Clock (REFCLK)".
9.6.1
Oscillator/Crystal
It is recommended that a crystal utilizing matching parallel load capacitors be used for the crystal
input/output signals (XTAL1I/XTAL2). See Table 9.12 for the recommended crystal specifications.
Table 9.12 Crystal Specifications
PARAMETER
SYMBOL
MIN
NOM
MAX
UNITS
NOTES
Crystal Cut
AT, typ
Fundamental Mode
Parallel Resonant Mode
Crystal Oscillation Mode
Crystal Calibration Mode
Frequency
Ffund
-
24.000
-
MHz
PPM
oC
Total Allowable PPM Budget
Operating Temperature Range
-
-
-
+/-350
Note 9.11
Note 9.10
Note 9.10 0oC for commercial version, -40oC for industrial version.
Note 9.11 +70oC for commercial version, +85oC for industrial version.
SMSC USB4604
67
Revision 1.0 (06-17-13)
DATASHEET
SMSC [ SMSC CORPORATION ]
