mpc8349ea Freescale Semiconductor, Inc, mpc8349ea Datasheet - Page 27

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

8.2.3
This section describes the TBI transmit and receive AC timing specifications.
8.2.3.1
Table 28
Figure 13
Freescale Semiconductor
At recommended operating conditions with LV
GTX_CLK clock period
GTX_CLK duty cycle
GTX_CLK to TBI data TXD[7:0], TX_ER, TX_EN delay
GTX_CLK clock rise, V
GTX_CLK clock fall time, V
GTX_CLK125 reference clock period
GTX_CLK125 reference clock duty cycle
Notes:
1. The symbols for timing specifications follow the pattern of t
2. This symbol represents the external GTX_CLK125 and does not follow the original symbol naming convention
and t
timing (TT) with respect to the time from t
or setup time. Also, t
the referenced data signals (D) reach the invalid state (X) or hold time. In general, the clock reference symbol is based on
three letters representing the clock of a particular function. 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).
(first two letters of functional block)(reference)(state)(signal)(state)
provides the TBI transmit AC timing specifications.
shows the TBI transmit AC timing diagram.
MPC8349EA PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 10
TBI AC Timing Specifications
TBI Transmit AC Timing Specifications
GTX_CLK
Parameter/Condition
TXD[7:0]
TX_EN
TX_ER
TTKHDX
IL
(min) to V
IH
(max) to V
symbolizes the TBI transmit timing (TT) with respect to the time from t
Table 28. TBI Transmit AC Timing Specifications
IH
(max)
Figure 13. TBI Transmit AC Timing Diagram
t
IL
TTXH
DD
(min)
/OV
TTX
DD
t
(K) going high (H) until the referenced data signals (D) reach the valid state (V)
TTX
of 3.3 V ± 10%.
(first two letters of functional block)(signal)(state)(reference)(state)
for outputs. For example, t
t
G125H
t
Symbol
TTXH
t
t
TTXF
TTKHDX
t
t
t
G125
t
TTXR
TTXF
TTX
/t
/t
TTX
G125
2
1
t
TTKHDX
t
Ethernet: Three-Speed Ethernet, MII Management
TTXR
Min
1.0
40
45
—
—
—
—
TTKHDV
TTX
Typ
represents the TBI (T) transmit
8.0
8.0
symbolizes the TBI transmit
—
—
—
—
—
TTX
(K) going high (H) until
Max
5.0
1.0
1.0
60
55
—
—
for inputs
Unit
ns
ns
ns
ns
ns
ns
%
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