mpc8349ea Freescale Semiconductor, Inc, mpc8349ea Datasheet - Page 26

• Manufacturer Part Number: mpc8349ea
• Description: Mpc8349ea Powerquicc
• Manufacturer: Freescale Semiconductor, Inc

Ethernet: Three-Speed Ethernet, MII Management
8.2.2.2
Table 27
Figure 11
Figure 12
26
At recommended operating conditions with LV
RX_CLK clock period 10 Mbps
RX_CLK clock period 100 Mbps
RX_CLK duty cycle
RXD[3:0], RX_DV, RX_ER setup time to RX_CLK
RXD[3:0], RX_DV, RX_ER hold time to RX_CLK
RX_CLK clock rise V
RX_CLK clock fall time V
Note:
1. The symbols for timing specifications follow the pattern of t
and t
(MR) with respect to the time data input signals (D) reach the valid state (V) relative to the t
the high (H) state or setup time. Also, t
(D) went invalid (X) relative to the t
reference symbol is based on three letters representing the clock of a particular functionl. For example, the subscript of t
represents the MII (M) receive (RX) clock. For rise and fall times, the latter convention is used with the appropriate letter:
R (rise) or F (fall).
(first two letters of functional block)(reference)(state)(signal)(state)
provides the MII receive AC timing specifications.
provides the AC test load for TSEC.
shows the MII receive AC timing diagram.
MPC8349EA PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 10
MII Receive AC Timing Specifications
RXD[3:0]
Parameter/Condition
RX_CLK
RX_DV
RX_ER
IL
(min) to V
IH
(max) to V
Output
IH
(max)
Table 27. MII Receive AC Timing Specifications
MRX
IL
Figure 12. MII Receive AC Timing Diagram
t
(min)
t
MRXH
MRDVKH
DD
MRDXKL
clock reference (K) going to the low (L) state or hold time. In general, the clock
/OV
Figure 11. TSEC AC Test Load
t
DD
MRX
symbolizes MII receive timing (GR) with respect to the time data input signals
of 3.3 V ± 10%.
Z
0
= 50 Ω
Valid Data
(first two letters of functional block)(signal)(state)(reference)(state)
for outputs. For example, t
t
MRXH
Symbol
t
t
t
MRXF
MRDVKH
MRDXKH
t
t
t
t
MRXR
MRXF
MRX
MRX
/t
MRX
1
R
t
MRDXKH
L
t
MRXR
= 50 Ω
10.0
10.0
Min
1.0
1.0
35
—
—
MRDVKH
OV
MRX
DD
Typ
400
40
—
—
—
—
—
symbolizes MII receive timing
/2
clock reference (K) going to
Freescale Semiconductor
Max
4.0
4.0
—
—
65
—
—
for inputs
Unit
ns
ns
ns
ns
ns
ns
%
MRX