mpc8640 Freescale Semiconductor, Inc, mpc8640 Datasheet - Page 34

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mpc8640

Manufacturer Part Number
mpc8640
Description
Integrated Host Processor
Manufacturer
Freescale Semiconductor, Inc
Datasheet
Ethernet: Enhanced Three-Speed Ethernet (eTSEC), MII Management
8.2.4.1
Table 32
At recommended operating conditions with L/TV
34
TCG[9:0] setup time GTX_CLK going high
TCG[9:0] hold time from GTX_CLK going high
GTX_CLK rise time (20%–80%)
GTX_CLK fall time (80%–20%)
Notes:
1. The symbols used for timing specifications herein follow the pattern of t
2. Guaranteed by design.
for inputs and t
transmit timing (TT) with respect to the time from t
state (V) or setup time. Also, t
(H) until the referenced data signals (D) reach the invalid state (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
letter: R (rise) or F (fall).
TTX
represents the TBI (T) transmit (TX) clock. For rise and fall times, the latter convention is used with the appropriate
provides the TBI transmit AC timing specifications.
TBI Transmit AC Timing Specifications
MPC8640 and MPC8640D Integrated Host Processor Hardware Specifications, Rev. 3
(first two letters of functional block)(reference)(state)(signal)(state)
Parameter
TTKHDX
Table 32. TBI Transmit AC Timing Specifications
symbolizes the TBI transmit timing (TT) with respect to the time from t
DD
of 3.3 V ± 5% and 2.5 V ± 5%.
TTX
(K) going high (H) until the referenced data signals (D) reach the valid
Symbol
t
t
TTKHDV
TTKHDX
t
t
TTXR
TTXF
for outputs. For example, t
2
2
(first two letters of functional block)(signal)(state )(reference)(state)
1
Min
2.0
1.0
Typ
TTKHDV
Freescale Semiconductor
symbolizes the TBI
Max
1.0
1.0
TTX
(K) going high
Unit
ns
ns
ns
ns

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