mpc8308 Freescale Semiconductor, Inc, mpc8308 Datasheet - Page 18

• Manufacturer Part Number: mpc8308
• Description: Mpc8308 Powerquicc Ii Pro Processor Hardware Specification
• Manufacturer: Freescale Semiconductor, Inc

Ethernet: Three-Speed Ethernet, MII Management
Figure 9
Figure 10
8.2.2
Table 25
18
At recommended operating conditions with LV
At recommended operating conditions with LV
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 used for timing specifications herein follow the pattern of t
Data to clock output skew (at transmitter)
Data to clock input skew (at receiver)
for inputs and t
receive timing (MR) with respect to the time data input signals (D) reach the valid state (V) relative to the t
(K) going to the high (H) state or setup time. Also, t
input signals (D) went invalid (X) relative to the t
general, the clock reference symbol representation is based on three letters representing the clock of a particular functional.
For example, the subscript of t
used with the appropriate letter: R (rise) or F (fall).
shows the MII receive AC timing diagram.
presents the RGMII AC timing specifications.
provides the AC test load.
RGMII AC Timing
(first two letters of functional block)(reference)(state)(signal)(state)
Parameter/Condition
RXD[3:0]
RX_CLK
Parameter/Condition
Figure 9. MII Receive AC Timing Diagram RMII AC Timing Specifications
RX_DV
RX_ER
IL
(min) to V
MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 1
IH
(max) to V
Output
Table 24. MII Receive AC Timing Specifications (continued)
IH
MRX
(max)
IL
represents the MII (M) receive (RX) clock. For rise and fall times, the latter convention is
2
Table 25. RGMII AC Timing Specifications
t
(min)
t
MRXH
MRDVKH
DD
DD
/NV
of 2.5 V ± 5%.
Specifications
t
MRX
DD
Z
Figure 10. AC Test Load
of 3.3 V ± 0.3V.
0
MRX
= 50 Ω
MRDXKL
clock reference (K) going to the low (L) state or hold time. Note that, in
Valid Data
Symbol
symbolizes MII receive timing (GR) with respect to the time data
t
t
SKRGT
SKRGT
Symbol
t
t
MRXF
MRDXKH
t
t
MRXR
MRXF
1
for outputs. For example, t
(first two letters of functional block)(signal)(state) (reference)(state)
1
R
t
MRDXKH
t
L
MRXR
–0.6
Min
1.0
= 50 Ω
10.0
Min
1.0
1.0
NV
LV
or
Typ
DD
—
—
Typ
DD/
—
—
—
/2
MRDVKH
2
Freescale Semiconductor
MRX
symbolizes MII
Max
4.0
4.0
—
Max
0.6
2.6
clock reference
Unit
Unit
ns
ns
ns
ns
ns