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MPC8349E PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 10
Freescale Semiconductor
27
Ethernet: Three-Speed Ethernet, MII Management
Figure 12
shows the TBI transmit AC timing diagram.
Figure 12. TBI Transmit AC Timing Diagram
8.2.3.2
TBI Receive AC Timing Specifications
Table 26
provides the TBI receive AC timing specifications.
Table 26. TBI Receive AC Timing Specifications
At recommended operating conditions with LV
DD
/OV
DD
of 3.3 V ± 10%.
Parameter/Condition
Symbol
1
Min
Typ
Max
Unit
PMA_RX_CLK clock period
t
TRX
16.0
ns
PMA_RX_CLK skew
t
SKTRX
7.5
—
8.5
ns
RX_CLK duty cycle
t
TRXH
/t
TRX
40
—
60
%
RXD[7:0], RX_DV, RX_ER (RCG[9:0]) setup time to rising
PMA_RX_CLK
t
TRDVKH
2
2.5
—
—
ns
RXD[7:0], RX_DV, RX_ER (RCG[9:0]) hold time to rising
PMA_RX_CLK
t
TRDXKH
2
1.5
—
—
ns
RX_CLK clock rise time V
IL
(min) to V
IH
(max)
t
TRXR
0.7
—
2.4
ns
RX_CLK clock fall time V
IH
(max) to V
IL
(min) t
TRXF
0.7
—
2.4
ns
Notes:
1. The symbols for timing specifications follow the pattern of t
(first two letters of functional block)(signal)(state)(reference)(state)
for inputs
and t
(first two letters of functional block)(reference)(state)(signal)(state)
for outputs. For example, t
TRDVKH
symbolizes TBI receive timing
(TR) with respect to the time data input signals (D) reach the valid state (V) relative to the t
TRX
clock reference (K) going to
the high (H) state or setup time. Also, t
TRDXKH
symbolizes TBI receive timing (TR) with respect to the time data input signals
(D) went invalid (X) relative to the t
TRX
clock reference (K) going to the high (H) state. In general, the clock reference symbol
is based on three letters representing the clock of a particular function. For example, the subscript of t
TRX
represents the TBI
(T) receive (RX) clock. For rise and fall times, the latter convention is used with the appropriate letter: R (rise) or F (fall). For
symbols representing skews, the subscript SK followed by the clock that is being skewed (TRX).
2. Setup and hold time of even numbered RCG are measured from the riding edge of PMA_RX_CLK1. Setup and hold times
of odd-numbered RCG are measured from the riding edge of PMA_RX_CLK0.
GTX_CLK
TXD[7:0]
t
TTX
t
TTXH
t
TTXR
t
TTXF
t
TTKHDX
TX_EN
TX_ER