mpc8347ecvvalf Freescale Semiconductor, Inc, mpc8347ecvvalf Datasheet - Page 25

• Manufacturer Part Number: mpc8347ecvvalf
• Description: Mpc8347e Powerquicc Ii Pro Family
• Manufacturer: Freescale Semiconductor, Inc

Figure 8
8.2.2
This section describes the MII transmit and receive AC timing specifications.
8.2.2.1
Table 23
Freescale Semiconductor
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 for timing specifications follow the pattern of t
G
and t
(MT) for the time t
symbol is based on two to three letters representing the clock of a particular function. For example, the subscript of t
represents the MII(M) transmit (TX) 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)
shows the GMII receive AC timing diagram.
provides the MII transmit AC timing specifications.
MPC8347E PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 10
MII AC Timing Specifications
MII Transmit AC Timing Specifications
RXD[7:0]
RX_CLK
Parameter/Condition
RX_DV
RX_ER
MTX
clock reference (K) going high (H) until data outputs (D) are invalid (X). In general, the clock reference
IH
IL
(max) to V
(min) to V
Table 23. MII Transmit AC Timing Specifications
IH
IL
Figure 8. GMII Receive AC Timing Diagram
t
t
(min)
(max)
GRXH
GRDVKH
DD
/OV
t
DD
GRX
of 3.3 V ± 10%.
for outputs. For example, t
(first two letters of functional block)(signal)(state)(reference)(state)
t
t
MTXH/
Symbol
GRXF
t
MTKHDX
t
t
t
t
MTXR
MTXF
MTX
MTX
t
GRDXKH
t
MTX
1
t
GRXR
Ethernet: Three-Speed Ethernet, MII Management
Min
1.0
1.0
35
—
—
1
MTKHDX
Typ
400
symbolizes MII transmit timing
40
—
—
—
5
Max
4.0
4.0
65
15
—
—
for inputs
MTX
Unit
ns
ns
ns
ns
ns
%
25