mpc8314e Freescale Semiconductor, Inc, mpc8314e Datasheet - Page 24

• Manufacturer Part Number: mpc8314e
• Description: Powerquicc Ii Pro Processor Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

Ethernet: Three-Speed Ethernet, MII Management
9.2
The AC timing specifications for MII, RMII, RGMII, and RTBI are presented in this section.
9.2.1
This section describes the MII transmit and receive AC timing specifications.
9.2.1.1
Table 25
24
At recommended operating conditions with LVDD of 3.3 V ± 300 mv.
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. Note that the symbol V
TX_CLK clock period 10 Mbps
TX_CLK clock period 100 Mbps
TX_CLK duty cycle
TX_CLK to MII data TXD[3:0], TX_ER, TX_EN delay
TX_CLK data clock rise V
TX_CLK data clock fall V
Note:
1. The symbols used for timing specifications follow the pattern of t
inputs and t
timing (MT) for the time t
the clock reference symbol representation is based on two to 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).
provides the MII transmit AC timing specifications.
MII, RMII, RGMII, and RTBI AC Timing Specifications
MII AC Timing Specifications
Parameters
(first two letters of functional block)(reference)(state)(signal)(state)
MII Transmit AC Timing Specifications
Table 24. RGMII/RTBI (When Operating at 2.5 V) DC Electrical Characteristics
Parameter/Condition
MPC8314E PowerQUICC
IH
IN
IL
(max) to V
MTX
, in this case, represents the LV
(min) to V
clock reference (K) going high (H) until data outputs (D) are invalid (X). Note that, in general,
MTX
Table 25. MII Transmit AC Timing Specifications
IH
IL
represents the MII(M) transmit (TX) clock. For rise and fall times, the latter convention is
(min)
(max)
Symbol
LVDD
V
V
V
V
I
I
OH
IH
OL
IL
IH
IL
™
II Pro Processor Hardware Specifications, Rev. 0
I
OH
I
OL
= –1.0 mA
IN
= 1.0 mA
—
—
—
symbol referenced in
V
t
Conditions
V
Symbol
MTXH/
IN
t
IN
MTKHDX
t
t
(first two letters of functional block)(signal)(state)(reference)(state)
t
t
MTXR
MTXF
1
for outputs. For example, t
MTX
MTX
1
= LVDD
= VSS
t
MTX
LVDD = Min
LVDD = Min
LVDD = Min
LVDD =Min
1
—
Min
1.0
1.0
35
—
—
Table 1
1
V
SS
and
2.37
2.00
–0.3
Min
–15
1.7
—
MTKHDX
– 0.3
Typ
400
Table
40
—
—
—
5
Freescale Semiconductor
2.
symbolizes MII transmit
LVDD + 0.3
LVDD + 0.3
Max
2.63
0.40
0.70
15
Max
—
4.0
4.0
65
15
—
—
Unit
Unit
μA
μA
ns
ns
ns
ns
ns
%
for
V
V
V
V
V