MPC8640DEC datasheet(44/140 Pages) FREESCALE

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MPC8640 and MPC8640D Integrated Host Processor Hardware Specifications, Rev. 1

Freescale Semiconductor

Local Bus

10 Local Bus

This section describes the DC and AC electrical specifications for the local bus interface of the MPC8640.

10.1

Local Bus DC Electrical Characteristics

Table 39 provides the DC electrical characteristics for the local bus interface operating at OVDD = 3.3 V

DC.

10.2

Local Bus AC Electrical Specifications

Table 40 describes the timing parameters of the local bus interface at OVDD = 3.3 V with PLL enabled.

For information about the frequency range of local bus see Section 18.1, “Clock Ranges.”

Table 39. Local Bus DC Electrical Characteristics (3.3 V DC)

Parameter

Symbol

Min

Max

Unit

High-level input voltage

VIH

2OVDD + 0.3

Low-level input voltage

VIL

–0.3

0.8

Input current

(VIN

1 = 0 V or V

IN = OVDD)

IIN

—±5

μA

High-level output voltage

(OVDD = min, IOH = –2 mA)

VOH

OVDD – 0.2

—

Low-level output voltage

(OVDD = min, IOL = 2 mA)

VOL

—0.2

Note:

1. Note that the symbol VIN, in this case, represents the OVIN symbol referenced in Table 1 and Table 2.

Table 40. Local Bus Timing Parameters (OVDD = 3.3 V)m - PLL Enabled

Parameter

Symbol 1

Min

Max

Unit

Notes

Local bus cycle time

tLBK

8—

Local Bus Duty Cycle

tLBKH/tLBK

LCLK[n] skew to LCLK[m] or

LSYNC_OUT

tLBKSKEW

—

150

7, 8

Input setup to local bus clock (except

LGTA/LUPWAIT)

tLBIVKH1

1.8

—

3, 4

LGTA/LUPWAIT input setup to local

bus clock

tLBIVKH2

1.7

—

3, 4

Input hold from local bus clock (except

LGTA/LUPWAIT)

tLBIXKH1

1.0

—

3, 4

LGTA/LUPWAIT input hold from local

bus clock

tLBIXKH2

1.0

—

3, 4

LALE output transition to LAD/LDP

output transition (LATCH hold time)

tLBOTOT

1.5

—

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