mpc8641 Freescale Semiconductor, Inc, mpc8641 Datasheet - Page 37

• Manufacturer Part Number: mpc8641
• Description: Integrated Host Processor Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

At recommended operating conditions with L/TV
8.2.4
This section describes the TBI transmit and receive AC timing specifications.
8.2.4.1
Table 32
Figure 16
Freescale Semiconductor
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
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 letter:
provides the TBI transmit AC timing specifications.
shows the TBI transmit AC timing diagram.
TBI AC Timing Specifications
TBI Transmit AC Timing Specifications
(first two letters of functional block)(reference)(state)(signal)(state)
MPC8641 and MPC8641D Integrated Host Processor Hardware Specifications, Rev. 2
GTX_CLK
Parameter/Condition
TCG[9:0]
TTKHDX
Table 32. TBI Transmit AC Timing Specifications
Figure 16. TBI Transmit AC Timing Diagram
symbolizes the TBI transmit timing (TT) with respect to the time from t
t
TTXH
t
TTKHDV
DD
t
TTXF
of 3.3 V ± 5% and 2.5 V ± 5%.
t
TTX
TTX
(K) going high (H) until the referenced data signals (D) reach the valid
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Symbol
t
t
t
TTKHDX
TTKHDV
t
TTXF
t
TTXR
TTXF
for outputs. For example, t
2
2
(first two letters of functional block)(signal)(state )(reference)(state)
1
t
TTKHDX
t
TTXR
Min
2.0
1.0
—
—
t
TTXR
Typ
—
—
—
—
TTKHDV
symbolizes the TBI
Max
1.0
1.0
—
—
TTX
(K) going high
Unit
ns
ns
ns
ns
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