MPC860 Motorola, MPC860 Datasheet - Page 65

• Manufacturer Part Number: MPC860
• Description: Family Hardware Specifications
• Manufacturer: Motorola

1
Figure 11-67 shows the I
Part XII UTOPIA AC Electrical Specifications
Table 12-26 shows the AC electrical specifications for the UTOPIA interface.
Figure 12-68 shows signal timings during UTOPIA receive operations.
MOTOROLA
Num
U1a
SCL frequency is given by SCL = BRGCLK_frequency / ((BRG register + 3) × pre_scaler × 2).
The ratio SYNCCLK/(BRGCLK / pre_scaler) must be greater or equal to 4/1.
U1
U2
U3
U4
U5
SDA
SCL
UtpClk rise/fall time (Internal clock option)
Duty cycle
Frequency
UtpClk rise/fall time (external clock option)
Duty cycle
Frequency
RxEnb and TxEnb active delay
UTPB, SOC, Rxclav and Txclav setup time
UTPB, SOC, Rxclav and Txclav hold time
UTPB, SOC active delay (and PHREQ and PHSEL active delay
in MPHY mode)
205
202
Table 12-26. UTOPIA AC Electrical Specifications
206
Signal Characteristic
Figure 11-67. I
2
203
C bus timing.
MPC860 Family Hardware Specifications
207
209
2
C Bus Timing Diagram
204
210
UTOPIA AC Electrical Specifications
Direction
Output
Output
Output
Input
Input
Input
208
Min
50
40
—
—
—
—
2
8
1
2
211
Max
3.5
3.5
50
50
60
50
16
16
—
—
MHz
MHz
Unit
ns
ns
ns
ns
ns
ns
%
%
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