mpc8343e Freescale Semiconductor, Inc, mpc8343e Datasheet - Page 22

• Manufacturer Part Number: mpc8343e
• Description: Mpc8343e Powerquicc
• Manufacturer: Freescale Semiconductor, Inc

Ethernet: Three-Speed Ethernet, MII Management
8.2
The AC timing specifications for MII, RGMII, and RTBI are presented in this section.
8.2.1
This section describes the MII transmit and receive AC timing specifications.
8.2.1.1
Table 21
22
At recommended operating conditions with LV
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
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 for timing specifications follow the pattern of t
and t
(MT) for the time t
symbol is based on two to three letters representing the clock of a particular function. For example, the subscript of t
represents the MII(M) transmit (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 MII transmit AC timing specifications.
MII, RGMII, and RTBI AC Timing Specifications
Parameters
MPC8343E PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 11
MII AC Timing Specifications
MII 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
MTX
clock reference (K) going high (H) until data outputs (D) are invalid (X). In general, the clock reference
IH
IL
(max) to V
(min) to V
Table 21. MII Transmit AC Timing Specifications
IH
IL
(min)
(max)
Symbol
DD
LV
V
V
V
V
I
I
/OV
OH
IH
OL
IL
IH
DD
IL
DD
of 3.3 V ± 10%.
IN
I
symbol referenced in
OH
I
OL
= –1.0 mA
= 1.0 mA
—
—
for outputs. For example, t
(first two letters of functional block)(signal)(state)(reference)(state)
V
Conditions
V
IN
t
IN
MTXH/
Symbol
t
1
1
MTKHDX
t
t
t
t
MTXR
MTXF
—
= LV
= GND
MTX
MTX
t
MTX
LV
LV
LV
LV
DD
1
Table 1
DD
DD
DD
DD
= Min
= Min
= Min
= Min
and
Min
1.0
1.0
35
—
—
1
Table
MTKHDX
GND – 0.3
2.37
2.00
–0.3
Min
–15
2.
1.7
—
Typ
400
symbolizes MII transmit timing
40
—
—
—
5
Freescale Semiconductor
LV
LV
DD
DD
Max
2.63
0.40
0.70
10
Max
—
4.0
4.0
65
15
—
—
+ 0.3
+ 0.3
for inputs
MTX
Unit
Unit
μA
μA
ns
ns
ns
ns
ns
%
V
V
V
V
V