mpc8641 Freescale Semiconductor, Inc, mpc8641 Datasheet - Page 38

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

At recommended operating conditions with L/TV
Ethernet: Enhanced Three-Speed Ethernet (eTSEC), MII Management
8.2.4.2
Table 33
PMA_RX_CLK[0:1] clock period
PMA_RX_CLK[0:1] skew
PMA_RX_CLK[0:1] duty cycle
RCG[9:0] setup time to rising PMA_RX_CLK
RCG[9:0] hold time to rising PMA_RX_CLK
PMA_RX_CLK[0:1] clock rise time (20%-80%)
PMA_RX_CLK[0:1] clock fall time (80%-20%)
Note:
1. The symbols used for timing specifications herein follow the pattern of t
2. Guaranteed by design.
3. ±100 ppm tolerance on PMA_RX_CLK[0:1] frequency
Figure 17
38
for inputs and t
timing (TR) with respect to the time data input signals (D) reach the valid state (V) relative to the t
to the high (H) state or setup time. Also, t
(D) went invalid (X) relative to the t
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). For symbols representing skews, the subscript is skew (SK) followed by the clock that is being skewed (TRX).
TRX
represents the TBI (T) receive (RX) clock. For rise and fall times, the latter convention is used with the appropriate letter:
provides the TBI receive AC timing specifications.
shows the TBI receive AC timing diagram.
PMA_RX_CLK1
PMA_RX_CLK0
TBI Receive AC Timing Specifications
(first two letters of functional block)(reference)(state)(signal)(state)
MPC8641 and MPC8641D Integrated Host Processor Hardware Specifications, Rev. 2
Parameter/Condition
RCG[9:0]
Table 33. TBI Receive AC Timing Specifications
TRX
Figure 17. TBI Receive AC Timing Diagram
clock reference (K) going to the high (H) state. Note that, in general, the clock reference
DD
TRDXKH
t
t
SKTRX
TRXH
t
TRDVKH
of 3.3 V ± 5% and 2.5 V ± 5%.
symbolizes TBI receive timing (TR) with respect to the time data input signals
t
TRX
t
TRXH
Valid Data
t
Symbol
TRXH
t
t
t
TRDVKH
TRDXKH
t
t
SKTRX
t
TRXR
TRXF
TRX
t
TRXF
/t
for outputs. For example, t
3
TRX
2
2
(first two letters of functional block)(signal)(state) (reference)(state)
1
Valid Data
t
TRDXKH
Min
t
7.5
2.5
1.5
0.7
0.7
40
TRXR
—
t
TRDVKH
t
TRDXKH
16.0
Typ
TRDVKH
—
—
—
—
—
—
TRX
Freescale Semiconductor
clock reference (K) going
symbolizes TBI receive
Max
8.5
2.4
2.4
60
—
—
—
Unit
ns
ns
ns
ns
ns
ns
%