mpc8349ea Freescale Semiconductor, Inc, mpc8349ea Datasheet - Page 24

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

Ethernet: Three-Speed Ethernet, MII Management
8.2.1.2
Table 25
Figure 9
24
At recommended operating conditions with LV
RX_CLK clock period
RX_CLK duty cycle
RXD[7:0], RX_DV, RX_ER setup time to RX_CLK
RXD[7:0], 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
G
and t
(GR) with respect to the time data input signals (D) reaching the valid state (V) relative to the t
to the high state (H) or setup time. Also, t
signals (D) went invalid (X) relative to the t
reference symbol is based on three letters representing the clock of a particular function. For example, the subscript of t
represents the GMII (G) 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)
shows the GMII receive AC timing diagram.
provides the GMII receive AC timing specifications.
MPC8349EA PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 10
GMII Receive AC Timing Specifications
RXD[7:0]
RX_CLK
Parameter/Condition
RX_DV
RX_ER
IL
(min) to V
IH
(max) to V
IH
Table 25. GMII Receive AC Timing Specifications
(max)
Figure 9. GMII Receive AC Timing Diagram
IL
t
t
GRXH
(min)
GRDVKH
DD
/OV
GRDXKL
GRX
t
DD
GRX
clock reference (K) going to the low (L) state or hold time. In general, the clock
of 3.3 V ± 10%.
symbolizes GMII receive timing (GR) with respect to the time data input
for outputs. For example, t
(first two letters of functional block)(signal)(state)(reference)(state)
t
t
GRXF
GRXH
Symbol
t
t
GRDVKH
GRDXKH
t
t
t
GRXR
GRXF
GRX
t
GRDXKH
/t
GRX
1
t
GRXR
Min
2.0
0.5
40
—
—
—
GRDVKH
symbolizes GMII receive timing
Typ
8.0
—
—
—
—
—
RX
clock reference (K) going
Freescale Semiconductor
Max
1.0
1.0
60
—
—
—
for inputs
Unit
ns
ns
ns
ns
ns
%
GRX