AT89C5130A-M_08 Datasheet, PDF (173/188 Pages) ATMEL Corporation – 8-bit Flash Microcontroller with Full Speed USB Device

27.5 USB AC Parameters
VCRS
Differential
Data Lines
Rise Time
90%
10%
tR
AT89C5130A/31A-M
Fall Time
90%
10%
tF
VHmin
VLmax
Table 27-14. USB AC Parameters
Symbol Parameter
Min
Typ
Max
Unit Test Conditions
t_R
t_F
t_FDRATE
V_CRS
t_DJ1
Rise Time
Fall Time
Full-speed Data Rate
Crossover Voltage
Source Jitter Total to Next
Transaction
4
4
11.9700
1.3
-3.5
20
20
12.0300
2.0
ns
ns
Mb/s
V
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
27.6 SPI Interface AC Parameters
27.6.0.1
Definition of Symbols
Table 27-15. SPI Interface Timing Symbol Definitions
Signals
C
Clock
H
I
Data In
L
O
Data Out
V
X
Z
Conditions
High
Low
Valid
No Longer Valid
Floating
27.6.0.2
Timings
Test conditions: capacitive load on all pins= 50 pF.
Table 27-16. SPI Interface Master AC Timing
4337K–USB–04/08
173