MPC7457 datasheet(17/68 Pages) FREESCALE

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MPC7457 RISC Microprocessor Hardware Specifications, Rev. 5

Freescale Semiconductor

Electrical and Thermal Characteristics

Table 9. Processor Bus AC Timing Specifications 1

At recommended operating conditions. See Table 4.

Parameter

Symbol 2

All Revisions and

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

tAVKH

tDVKH

tIVKH

tMVKH

1.8

—

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,

HD[0:1]

BMODE[0:1], BVSEL, L3VSEL

tAXKH

tDXKH

tIXKH

tMXKH

—

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

tKHAV

tKHDV

tKHOV

—

2.0

Output hold 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

tKHAX

tKHDX

tKHOX

0.5

—

SYSCLK to output enable

tKHOE

0.5

—

SYSCLK to output high impedance (all except TS, ARTRY,

SHD0, SHD1)

tKHOZ

—

3.5

SYSCLK to TS high impedance after precharge

tKHTSPZ

—

tSYSCLK

3, 4, 5

Maximum delay to ARTRY/SHD0/SHD1 precharge

tKHARP

—

tSYSCLK

3, 5

6, 7

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