
68
MPC862/857T/857DSL Hardware Specifications
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
UTOPIA AC Electrical Specifications
Figure 70 shows the I
2
C bus timing.
Figure 70. I
2
C Bus Timing Diagram
12
UTOPIA AC Electrical Specifications
Table 28 shows the AC electrical specifications for the UTOPIA interface.
Table 28. UTOPIA AC Electrical Specifications
Num
Signal Characteristic
Direction
Min
Max
Unit
U1
UtpClk rise/fall time (Internal clock option)
Output
4 ns
ns
Duty cycle
50
50
%
Frequency
33
MHz
U1a
UtpClk rise/fall time (external clock option)
Input
4ns
ns
Duty cycle
40
60
%
Frequency
33
MHz
U2
RxEnb and TxEnb active delay
Output
2 ns
16 ns
ns
U3
UTPB, SOC, Rxclav and Txclav setup time
Input
4 ns
ns
U4
UTPB, SOC, Rxclav and Txclav hold time
Input
1 ns
ns
U5
UTPB, SOC active delay (and PHREQ and PHSEL active
delay in MPHY mode)
Output
2 ns
16 ns
ns
SCL
202
205
203
207
204
208
206
209
211
210
SDA
F
Freescale Semiconductor, Inc.
n
.