MPC8315 datasheet(32/106 Pages) FREESCALE

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MPC8315E PowerQUICC II Pro Processor Hardware Specifications, Rev. 2

Freescale Semiconductor

Ethernet: Three-Speed Ethernet, MII Management

9.3.2

MII Management AC Electrical Specifications

This table provides the MII management AC timing specifications.

Input low current

IIL

NVDD = Max

VIN = 0.5 V

–600

—

A

Note:

1. The symbol VIN, in this case, represents the NVIN symbol referenced in Table 1 and Table 2.

Table 31. MII Management AC Timing Specifications

At recommended operating conditions with NVDD is 3.3 V ± 300 mv

Parameter/Condition

Symbol 1

Min

Typ

Max

Unit

Note

MDC frequency

fMDC

—2.5

—

MHz

MDC period

tMDC

—

400

—

MDC clock pulse width high

tMDCH

—

MDC to MDIO delay

tMDKHDX

—

170

MDIO to MDC setup time

tMDDVKH

5—

—

MDIO to MDC hold time

tMDDXKH

0—

—

MDC rise time

tMDCR

—

MDC fall time

tMDHF

—

Note:

1. The symbols used for timing specifications herein 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, tMDKHDX symbolizes

management data timing (MD) for the time tMDC from clock reference (K) high (H) until data outputs (D) are invalid (X) or data

hold time. Also, tMDDVKH symbolizes management data timing (MD) with respect to the time data input signals (D) reach the

valid state (V) relative to the tMDC 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 (that is, for a csb_clk of 133 MHz, the maximum frequency is 4.16 MHz and

the minimum frequency is 0.593 MHz).

3. This parameter is dependent on the csb_clk speed (that is, for a csb_clk of 133 MHz, the delay is 60 ns).

Table 30. MII Management DC Electrical Characteristics Powered at 3.3 V (continued)

Parameter

Symbol

Conditions

Min

Max

Unit

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