MPC7457EC 데이터 시트보기 (PDF) - Freescale Semiconductor

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MPC7457EC

RISC Microprocessor

Freescale Semiconductor 

Electrical and Thermal Characteristics

Table 9. Processor Bus AC Timing Specifications 1

At recommended operating conditions. See Table 4.

Parameter

Symbol 2

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

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

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

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

SYSCLK to output enable

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

SHD0, SHD1)

SYSCLK to TS high impedance after precharge

Maximum delay to ARTRY/SHD0/SHD1 precharge

tAVKH

tDVKH

tIVKH

tMVKH

tAXKH

tDXKH

tIXKH

tMXKH

tKHAV

tKHDV

tKHOV

tKHAX

tKHDX

tKHOX

tKHOE

tKHOZ

tKHTSPZ

tKHARP

All Revisions and

Speed Grades

Min

Max

1.8

—

1.8

—

1.8

—

Unit Notes

ns

1.8

—

8

ns

0

—

0

—

0

—

0

—

8

ns

—

2.0

—

2.0

—

2.0

ns

0.5

—

0.5

—

0.5

—

0.5

—

ns

—

3.5

ns

—

1

tSYSCLK 3, 4, 5

—

1

tSYSCLK

3, 5

6, 7

MPC7457 RISC Microprocessor Hardware Specifications, Rev. 8

Freescale Semiconductor

19

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