mpc855t Freescale Semiconductor, Inc, mpc855t Datasheet - Page 58

• Manufacturer Part Number: mpc855t
• Description: Mpc855t Powerquicc Integrated Communications Processor
• Manufacturer: Freescale Semiconductor, Inc

CPM Electrical Characteristics
1
2
58
Num
135
136
137
138
139
The ratios SYNCCLK/RCLK1 and SYNCCLK/TCLK1 must be greater than or equal to 2/1.
SDACK is asserted whenever the SDMA writes the incoming frame DA into memory.
RSTRT active delay (from TCLK1 falling edge)
RSTRT inactive delay (from TCLK1 falling edge)
REJECT width low
CLKO1 low to SDACK asserted
CLKO1 low to SDACK negated
RENA(CD1)
CLSN(CTS1)
RCLK1
(Input)
(Input)
RxD1
(Input)
MPC860 PowerQUICC™ Family Hardware Specifications, Rev. 8
Figure 59. Ethernet Collision Timing Diagram
Figure 60. Ethernet Receive Timing Diagram
2
Table 22. Ethernet Timing (continued)
2
Characteristic
121
124
120
125
121
126
123
Min
10
10
All Frequencies
—
—
1
Last Bit
127
Freescale Semiconductor
Max
50
50
20
20
—
Unit
CLK
ns
ns
ns
ns