Datasheet

173
4337K–USB–04/08
AT89C5130A/31A-M
27.5 USB AC Parameters
27.6 SPI Interface AC Parameters
27.6.0.1 Definition of Symbols
Table 27-15. SPI Interface Timing Symbol Definitions
27.6.0.2 Timings
Test conditions: capacitive load on all pins= 50 pF.
Table 27-16. SPI Interface Master AC Timing
Rise Time Fall Time
VCRS
Differential
Data Lines
90%
10%
90%
10%
tR
tF
VHmin
VLmax
Table 27-14. USB AC Parameters
Symbol Parameter Min Typ Max Unit Test Conditions
t
R
Rise Time 4 20 ns
t
F
Fall Time 4 20 ns
t
FDRATE
Full-speed Data Rate 11.9700 12.0300 Mb/s
V
CRS
Crossover Voltage 1.3 2.0 V
t
DJ1
Source Jitter Total to Next
Transaction
-3.5 3.5 ns
t
DJ2
Source Jitter Total for Paired
Transactions
-4 4 ns
t
JR1
Receiver Jitter to Next
Transaction
-18.5 18.5 ns
t
JR2
Receiver Jitter for Paired
Transactions
-9 9 ns
Signals Conditions
C Clock H High
I Data In L Low
O Data Out V Valid
X No Longer Valid
Z Floating