mpc880 Freescale Semiconductor, Inc, mpc880 Datasheet - Page 62

• Manufacturer Part Number: mpc880
• Description: Mpc885 Powerquicc Integrated Communications Processor
• Manufacturer: Freescale Semiconductor, Inc

CPM Electrical Characteristics
1
2
62
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.
Num
134
138
139
RENA(CD1)
TENA inactive delay (from TCLK1 rising edge)
CLKO1 low to SDACK asserted
CLKO1 low to SDACK negated
CLSN(CTS1)
RCLK1
(Input)
(Input)
RxD1
(Input)
MPC885/MPC880 PowerQUICC™ Hardware Specifications, Rev. 4
Figure 62. Ethernet Collision Timing Diagram
Figure 63. Ethernet Receive Timing Diagram
Table 24. Ethernet Timing (continued)
2
Characteristic
2
121
124
120
125
121
126
123
All Frequencies
Min
Last Bit
10
—
—
127
Freescale Semiconductor
Max
50
20
20
Unit
ns
ns
ns