mpc8568e Freescale Semiconductor, Inc, mpc8568e Datasheet - Page 35

• Manufacturer Part Number: mpc8568e
• Description: Mpc8568e Powerquicc Iii Processor
• Manufacturer: Freescale Semiconductor, Inc

8.2.4.1
Table 31
Figure 15
Freescale Semiconductor
At recommended operating conditions with L/TV
GTX_CLK clock period
GTX_CLK duty cycle
TCG[9:0] setup time GTX_CLK going high
TCG[9:0] hold time from GTX_CLK going high
GTX_CLK rise (20%–80%)
GTX_CLK fall time (80%–20%)
EC_GTX_CLK125 clock rise time (20%-80%)
EC_GTX_CLK125 clock fall time (80%-20%)
EC_GTX_CLK125 duty cycle
Notes:
1. The symbols used for timing specifications herein follow the pattern of t
2. Guaranteed by design.
)(reference)(state)
t
referenced data signals (D) reach the valid state (V) or setup time. Also, t
(TT) with respect to the time from t
(X) or hold time. Note that, in general, the clock reference symbol representation is based on three letters
representing the clock of a particular functional. For example, the subscript of t
(TX) clock. For rise and fall times, the latter convention is used with the appropriate letter: R (rise) or F (fall).
TTKHDV
provides the TBI transmit AC timing specifications.
shows the TBI transmit AC timing diagram.
MPC8568E/MPC8567E PowerQUICC III™ Integrated Processor Hardware Specifications, Rev. 0
TBI Transmit AC Timing Specifications
symbolizes the TBI transmit timing (TT) with respect to the time from t
GTX_CLK
TCG[9:0]
Parameter/Condition
for inputs and t
Table 31. TBI Transmit AC Timing Specifications
Figure 15. TBI Transmit AC Timing Diagram
(first two letters of functional block)(reference)(state)(signal)(state)
t
TTXH
TTX
t
TTKHDV
DD
t
TTXF
(K) going high (H) until the referenced data signals (D) reach the invalid state
of 3.3 V ± 5%.
t
TTX
t
G125H
t
Symbol
TTXH
t
t
TTKHDX
t
TTKHDV
t
t
t
t
TTXF
TTXR
G125R
TTXF
G125F
t
TTX
/t
/t
TTX
G125
2
2
3
1
t
TTKHDX
(first two letters of functional block)(signal)(state
t
TTKHDX
TTXR
Min
2.0
1.0
47
45
—
—
—
—
—
TTX
TTX
symbolizes the TBI transmit timing
Ethernet Interface and MII Management
(K) going high (H) until the
represents the TBI (T) transmit
for outputs. For example,
t
Typ
TTXR
8.0
1.0
1.0
1.0
1.0
—
—
—
—
Max
2.0
2.0
2.0
2.0
53
55
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
%
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