MPC8308 datasheet(21/88 Pages) FREESCALE

21 / 88 page

MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 0

Freescale Semiconductor

Ethernet: Three-Speed Ethernet, MII Management

Figure 12 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

Table 28 provides the IEEE 1588 timer DC specifications.

MDC fall time

tMDHF

——

—

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, 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. (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

VOH

IOH = –8.0 mA

2.4

—

Output low voltage

VOL

IOL = 8.0 mA

—

0.5

Output low voltage

VOL

IOL = 3.2 mA

—

0.4

Input high voltage

VIH

—

2.0

NVDD + 0.3

Table 27. MII Management AC Timing Specifications (continued)

At recommended operating conditions with LVDDA/LVDDB is 3.3 V ± 0.3V

Parameter/Condition

Symbol 1

Min

Typ

Max

Unit

Notes

MDC

tMDDXKH

tMDC

tMDCH

tMDCR

tMDCF

tMDDVKH

tMDKHDX

MDIO

(Input)

(Output)

MPC8308 数据表(PDF) 21 Page - Freescale Semiconductor, Inc

MPC8308 数据表(HTML) 21 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88

数据表下载