mpc8308 Freescale Semiconductor, Inc, mpc8308 Datasheet - Page 17

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

8.2.1.1
Table 23
Figure 8
8.2.1.2
Table 24
Freescale Semiconductor
At recommended operating conditions with LV
At recommended operating conditions with LV
TX_CLK clock period 10 Mbps
TX_CLK clock period 100 Mbps
TX_CLK duty cycle
TX_CLK to MII data TXD[3:0], TX_ER, TX_EN delay
TX_CLK data clock rise V
TX_CLK data clock fall V
Note:
1. The symbols used for timing specifications follow the pattern of t
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
inputs and t
timing (MT) for the time t
the clock reference symbol representation is based on two to 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 transmit AC timing diagram.
provides the MII transmit AC timing specifications.
provides the MII receive AC timing specifications.
(first two letters of functional block)(reference)(state)(signal)(state)
MII Transmit AC Timing Specifications
MII Receive AC Timing Specifications
TXD[3:0]
Parameter/Condition
TX_CLK
Parameter/Condition
TX_EN
TX_ER
MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 1
IH
IL
(max) to V
MTX
(min) to V
clock reference (K) going high (H) until data outputs (D) are invalid (X). Note that, in general,
MTX
Table 23. MII Transmit AC Timing Specifications
Table 24. MII Receive AC Timing Specifications
IH
IL
represents the MII(M) transmit (TX) clock. For rise and fall times, the latter convention is
Figure 8. MII Transmit AC Timing Diagram
t
(min)
(max)
MTXH
DDA
DD
/NV
/
LV
t
MTX
DDB
DD
of 3.3 V ± 0.3V.
/NV
DD
of 3.3 V ± 0.3V.
t
t
t
Symbol
MTKHDX
Symbol
MRXH
MTXH/
t
t
t
MTXF
MTKHDX
MRDVKH
t
t
t
t
MTXR
t
t
MTXF
(first two letters of functional block)(signal)(state) (reference)(state)
MTX
MTX
MRX
MRX
for outputs. For example, t
/t
t
MTX
MRX
1
1
t
MTXR
Ethernet: Three-Speed Ethernet, MII Management
10.0
Min
Min
1.0
1.0
35
35
—
—
—
—
1
MTKHDX
Typ
400
Typ
400
40
40
—
—
—
—
—
5
symbolizes MII transmit
Max
Max
4.0
4.0
—
—
65
15
—
—
65
—
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
%
%
for
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