MPC7457 Hardware Specification Addendum for the MPC74n7RXnnnnNx Series, Rev. 3

4

Freescale Semiconductor

General Parameters

Table 8 provides the clock AC timing specifications for the MPC7457 part numbers described herein.

5.2.2 Processor Bus AC Specifications

Table 9 provides the processor bus AC timing specifications for the MPC7457 part numbers described herein.

Table 8. Clock AC Timing Specifications

At recommended operating conditions. See Table 4.

Characteristic

Symbol

Maximum Processor Core Frequency

Unit

Notes

600 MHz

733 MHz

867 MHz

1000 MHz

Min

Max

Min

Max

Min

Max

Min

Max

Processor frequency

500

600

500

733

500

867

500

1000

MHz

1

VCO frequency

1000

1200

1000

1466

1000

1733

1000

2000

MHz

1

SYSCLK frequency

33

167

33

167

33

167

33

167

MHz

1, 2

SYSCLK cycle time

6.0

30

6.0

30

6.0

30

6.0

30

ns

2

Note:

1. Caution: The SYSCLK frequency and PLL_CFG[0:4] settings must be chosen such that the resulting SYSCLK

(bus) frequency, CPU (core) frequency, and PLL (VCO) frequency do not exceed their respective maximum or

minimum operating frequencies. Refer to the PLL_CFG[0:4] signal description in

MPC7457 RISC Microprocessor

Hardware Specifications, Section 1.9.1, “PLL Configuration,” for valid PLL_CFG[0:4] settings.

2. Assumes lightly-loaded, single-processor system; see

MPC7457 RISC Microprocessor Hardware Specifications,

Section 5.2.1, “Clock AC Specifications” for more information.

At recommended operating conditions. See Table 4.

Parameter

All Speed Grades

Unit

Notes

Min

Max

Input setup times:

A[0:35], AP[0:4]

D[0:63], DP[0:7]

AACK, ARTRY, BG, CKSTP_IN, DBG, DTI[0:3], GBL,

TT[0:3], QACK, TA, TBEN, TEA, TS,

EXT_QUAL, PMON_IN, SHD[0:1], BMODE[0:1],

BMODE[0:1], BVSEL, L3VSEL

2.0

2.0

2.0

2.0

—

—

—

—

ns

8

Input hold times:

A[0:35], AP[0:4]

D[0:63], DP[0:7]

AACK, ARTRY, BG, CKSTP_IN, DBG, DTI[0:3], GBL,

TT[0:3], QACK, TA, TBEN, TEA, TS, EXT_QUAL, PMON_IN,

SHD[0:1]

BMODE[0:1], BVSEL, L3VSEL

0

0

0

0

—

—

—

—

ns

8

Output valid times:

A[0:35], AP[0:4]

D[0:63], DP[0:7]

AACK, ARTRY, BR, CI, CKSTP_IN, DRDY, DTI[0:3], GBL, HIT,

PMON_OUT, QREQ, TBST, TSIZ[0:2], TT[0:3], TS, SHD[0:1],

WT

—

—

—

2.0

2.0

2.0

ns