MPC8347 FREESCALE [Freescale Semiconductor, Inc], MPC8347 Datasheet - Page 30

• Manufacturer Part Number: MPC8347
• Description: Integrated Host Processor Hardware Specifications
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

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8.2.3
This section describes the TBI transmit and receive AC timing specifications.
8.2.3.1
Table 28
Figure 12
30
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.
TBI AC Timing Specifications
MPC8347EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 3
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 12. TBI Transmit AC Timing Diagram
t
IL
TTXH
DD
(min)
/ OV
TTX
t
(K) going high (H) until the referenced data signals (D) reach the valid state (V)
TTX
DD
of 3.3 V ± 10%.
for outputs. For example, t
(first two letters of functional block)(signal)(state )(reference)(state)
t
G125H
Symbol
t
TTXH
t
t
t
TTXF
TTKHDX
t
G125
t
TTXR
t
TTXF
TTX
/t
/t
TTX
G125
2
1
t
TTKHDX
t
TTXR
Min
1.0
40
45
—
—
—
—
TTKHDV
TTX
Typ
8.0
8.0
represents the TBI (T) transmit
—
—
—
—
—
symbolizes the TBI transmit
TTX
Freescale Semiconductor
(K) going high (H) until
Max
5.0
1.0
1.0
—
60
—
55
for inputs
Unit
ns
ns
ns
ns
ns
ns
%