MPC8358E_11 FREESCALE [Freescale Semiconductor, Inc], MPC8358E_11 Datasheet - Page 27

• Manufacturer Part Number: MPC8358E_11
• Description: PowerQUICC II Pro Processor Revision 2.1 PBGA Silicon
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

8.2
The AC timing specifications for GMII, MII, TBI, RGMII, and RTBI are presented in this section.
8.2.1
This sections describe the GMII transmit and receive AC timing specifications.
8.2.1.1
Table 26
Freescale Semiconductor
At recommended operating conditions with LV
Supply voltage 2.5 V
Output high voltage
Output low voltage
Input high voltage
Input low voltage
Input current
GTX_CLK clock period
GTX_CLK duty cycle
GTX_CLK to GMII data TXD[7:0], TX_ER, TX_EN delay
GTX_CLK clock rise time, (20% to 80%)
GTX_CLK clock fall time, (80% to 20%)
GTX_CLK125 clock period
GTX_CLK125 reference clock duty cycle measured at
LV
Notes:
1. The symbols used for timing specifications follow the pattern t
2. This symbol is used to represent the external GTX_CLK125 signal and does not follow the original symbol naming
DD/2
and t
(GT) with respect to the t
the valid state (V) to state or setup time. Also, t
reference (K) going to the high state (H) relative to the time date input signals (D) going invalid (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
used with the appropriate letter: R (rise) or F (fall).
convention.
(first two letters of functional block)(reference)(state)(signal)(state)
MPC8358E PowerQUICC II Pro Processor Revision 2.1 PBGA Silicon Hardware Specifications, Rev. 3
provides the GMII transmit AC timing specifications.
GMII, MII, RMII, TBI, RGMII, and RTBI AC Timing Specifications
Parameters
GMII Timing Specifications
GMII Transmit AC Timing Specifications
Table 25. RGMII/RTBI DC Electrical Characteristics (when operating at 2.5 V)
Parameter/Condition
GTX
clock reference (K) going to the high state (H) relative to the time date input signals (D) reaching
GTX
Table 26. GMII Transmit AC Timing Specifications
represents the GMII(G) transmit (TX) clock. For rise and fall times, the latter convention is
DD
Symbol
/OV
LV
V
V
V
V
I
OH
IN
OL
DD
IH
IL
DD
of 3.3 V ± 10%.
GTKHDX
I
OH
I
OL
symbolizes GMII transmit timing (GT) with respect to the t
= –1.0 mA
= 1.0 mA
—
—
for outputs. For example, t
t
0 V ≤ V
G125H
t
Symbol
GTXH/tGTX
(first two letters of functional block)(signal)(state)(reference)(state)
t
t
GTKHDX
GTKHDV
UCC Ethernet Controller: Three-Speed Ethernet, MII Management
Conditions
t
t
t
t
GTXR
GTXF
G125
GTX
/t
—
G125
IN
1
≤ LV
LV
LV
LV
LV
DD
DD
DD
DD
DD
Min
= Min
= Min
= Min
= Min
0.5
40
45
—
—
—
—
—
GTKHDV
Typ
GND – 0.3
8.0
8.0
—
—
—
—
—
2.37
2.00
–0.3
Min
symbolizes GMII transmit timing
1.7
—
Max
5.0
1.0
1.0
—
60
—
—
55
LV
LV
DD
DD
Max
2.63
0.40
0.70
±10
+ 0.3
+ 0.3
Unit
ns
ns
ns
ns
ns
%
%
GTX
for inputs
Notes
clock
Unit
μA
—
—
—
—
—
V
V
V
V
V
2
2
27