MPC870 FREESCALE [Freescale Semiconductor, Inc], MPC870 Datasheet - Page 61

• Manufacturer Part Number: MPC870
• Description: Hardware Specifications
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

CPM Electrical Characteristics
13.8 SMC Transparent AC Electrical Specifications
Table 25
61
1
151A
Num
SyncCLK must be at least twice as fast as SMCLK.
150
151
152
153
154
155
TENA(RTS3)
provides the SMC transparent timings as shown in
RENA(CD3)
(NOTE 2)
(Output)
SMCLK clock period
SMCLK width low
SMCLK width high
SMCLK rise/fall time
SMTXD active delay (from SMCLK falling edge)
SMRXD/SMSYNC setup time
RXD1/SMSYNC hold time
TCLK3
(Input)
(Input)
TxD3
NOTES:
1.
2.
128
Transmit clock invert (TCI) bit in GSMR is set.
If RENA is negated before TENA or RENA is not asserted at all during transmit, then the
CSL bit is set in the buffer descriptor at the end of the frame transmission.
133
131
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
1
MPC875/MPC870 Hardware Specifications, Rev. 3.0
Figure 57. Ethernet Transmit Timing Diagram
Table 25. SMC Transparent Timing
Characteristic
128
Figure
121
58.
132
129
Frequencies
Min
100
50
50
—
10
20
5
Freescale Semiconductor
134
All
Max
15
50
—
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns