Datasheet

MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 3
22 Freescale Semiconductor
Ethernet: Three-Speed Ethernet, MII Management
This figure shows the MII management AC timing diagram.
Figure 12. MII Management Interface Timing Diagram
8.4 IEEE Std 1588™ Timer Specifications
This section describes the DC and AC electrical specifications for the 1588 timer.
8.4.1 IEEE 1588 Timer DC Specifications
This table provides the IEEE 1588 timer DC specifications.
MDC fall time t
MDHF
——10ns—
Notes:
1. The symbols used for timing specifications Follow the pattern of t
(first two letters of functional block)(signal)(state) (reference)(state)
for
inputs and t
(first two letters of functional block)(reference)(state)(signal)(state)
for outputs. For example, t
MDKHDX
symbolizes management
data timing (MD) for the time t
MDC
from clock reference (K) high (H) until data outputs (D) are invalid (X) or data hold time.
Also, t
MDDVKH
symbolizes management data timing (MD) with respect to the time data input signals (D) reach the valid state
(V) relative to the t
MDC
clock reference (K) going to the high (H) state or setup time. For rise and fall times, the latter
convention is used with the appropriate letter: R (rise) or F (fall).
2. This parameter is dependent on the csb_clk speed. (The MIIMCFG[Mgmt Clock Select] field determines the clock frequency
of the Mgmt Clock EC_MDC.)
3. This parameter is dependent on the cbs_clk speed (that is, for a csb_clk of 133 MHz, the delay is 60 ns).
Table 28. GPIO DC Electrical Characteristics
Characteristic Symbol Condition Min Max Unit
Output high voltage V
OH
I
OH
= –8.0 mA 2.4 — V
Output low voltage V
OL
I
OL
= 8.0 mA — 0.5 V
Output low voltage V
OL
I
OL
= 3.2 mA — 0.4 V
Input high voltage V
IH
— 2.0 NVDD + 0.3 V
Table 27. MII Management AC Timing Specifications (continued)
At recommended operating conditions with LV
DDA
/LV
DDB
is 3.3 V ± 0.3V
Parameter/Condition Symbol
1
Min Typ Max Unit Notes
MDC
t
MDDXKH
t
MDC
t
MDCH
t
MDCR
t
MDCF
t
MDDVKH
t
MDKHDX
MDIO
MDIO
(Input)
(Output)