mpc8555e Freescale Semiconductor, Inc, mpc8555e Datasheet - Page 27

• Manufacturer Part Number: mpc8555e
• Description: Mpc8555e Powerquicc Iii Processor With Integrated Security
• Manufacturer: Freescale Semiconductor, Inc

8.2.3.2
Table 23
Figure 11
Freescale Semiconductor
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 and fall time
Notes:
1. The symbols used for timing specifications herein follow the pattern of t
2. Signal timings are measured at 0.7 V and 1.9 V voltage levels.
3.Guaranteed by design.
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).
MPC8555E PowerQUICC™ III Integrated Communications Processor Hardware Specification, Rev. 4.2
provides the MII receive AC timing specifications.
shows the MII receive AC timing diagram.
MII Receive AC Timing Specifications
(first two letters of functional block)(reference)(state)(signal)(state)
Parameter/Condition
RXD[3:0]
RX_CLK
RX_DV
RX_ER
MRX
Table 23. MII Receive AC Timing Specifications
represents the MII (M) receive (RX) clock. For rise and fall times, the latter convention is
Figure 11. MII Receive AC Timing Diagram
t
t
MRXH
MRDVKH
DD
of 3.3 V ± 5%.
t
MRX
MRX
MRDXKL
clock reference (K) going to the low (L) state or hold time. Note that, in
Valid Data
t
MRXR
symbolizes MII receive timing (GR) with respect to the time data
t
MRXH
Symbol
t
t
MRDVKH
MRDXKH
t
t
MRXF
t
MRX
, t
MRX
MRXF
/t
MRX
2
for outputs. For example, t
1
(first two letters of functional block)(signal)(state) (reference)(state)
2,3
t
MRDXKH
t
MRXR
10.0
10.0
Min
1.0
35
—
—
Ethernet: Three-Speed, MII Management
Typ
400
40
—
—
—
—
MRDVKH
MRX
symbolizes MII
Max
4.0
—
—
65
—
—
clock reference
Unit
ns
ns
ns
ns
ns
%
27