mpc8347ecvvalf Freescale Semiconductor, Inc, mpc8347ecvvalf Datasheet - Page 23

• Manufacturer Part Number: mpc8347ecvvalf
• Description: Mpc8347e Powerquicc Ii Pro Family
• Manufacturer: Freescale Semiconductor, Inc

At recommended operating conditions with LV
8.2
The AC timing specifications for GMII, MII, TBI, RGMII, and RTBI are presented in this section.
8.2.1
This section describes the GMII transmit and receive AC timing specifications.
8.2.1.1
Table 21
Freescale Semiconductor
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, V
GTX_CLK clock fall time, V
GTX_CLK125 clock period
GTX_CLK125 reference clock duty cycle measured at LV
Notes:
1. The symbols for timing specifications follow the pattern t
2. This symbol represents the external GTX_CLK125 signal and does not follow the original symbol naming convention.
Supply voltage 2.5 V
Output high voltage
Output low voltage
Input high voltage
Input low voltage
Input high current
Input low current
Note:
1. The symbol V
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. In general,
the clock reference symbol is based on three letters representing the clock of a particular function. For example, the subscript
of t
letter: R (rise) or F (fall).
(first two letters of functional block)(reference)(state)(signal)(state)
GTX
represents the GMII(G) transmit (TX) clock. For rise and fall times, the latter convention is used with the appropriate
provides the GMII transmit AC timing specifications.
GMII, MII, TBI, RGMII, and RTBI AC Timing Specifications
Parameters
MPC8347E PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 10
GMII Timing Specifications
GMII Transmit AC Timing Specifications
IN
Table 20. RGMII/RTBI (When Operating at 2.5 V) DC Electrical Characteristics
, in this case, represents the LV
Parameter/Condition
IH
GTX
IL
(max) to V
(min) to V
clock reference (K) going to the high state (H) relative to the time date input signals (D) reaching
Table 21. GMII Transmit AC Timing Specifications
IH
IL
Symbol
DD
(min)
(max)
LV
V
V
V
V
/OV
I
I
OH
IH
OL
IL
IH
DD
IL
DD
of 3.3 V ± 10%.
GTKHDX
IN
I
symbol referenced in
OH
I
OL
= –1.0 mA
= 1.0 mA
for outputs. For example, t
DD
symbolizes GMII transmit timing (GT) with respect to the t
—
—
(first two letters of functional block)(signal)(state)(reference)(state)
/2
V
Conditions
V
IN
IN
t
t
G125H
1
GTXH
1
Symbol
t
—
= LV
= GND
GTKHDX
t
t
t
G125
t
GTXR
GTXF
GTX
/t
/t
LV
LV
LV
LV
DD
GTX
G125
2
Table 1
1
DD
DD
DD
DD
= Min
= Min
= Min
= Min
Ethernet: Three-Speed Ethernet, MII Management
and
43.75
Min
GTKHDV
0.5
45
—
—
—
—
Table
GND – 0.3
symbolizes GMII transmit timing
2.37
2.00
–0.3
Min
–15
2.
1.7
—
Typ
8.0
8.0
—
—
—
—
—
LV
LV
DD
DD
56.25
Max
2.63
0.40
0.70
Max
10
—
5.0
1.0
1.0
—
—
55
+ 0.3
+ 0.3
for inputs and
GTX
Unit
Unit
μA
μA
clock
ns
ns
ns
ns
ns
V
V
V
V
V
%
%
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