MPC7448EC 查看數據表（PDF） - Freescale Semiconductor

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MPC7448EC

RISC Microprocessor Hardware Specifications

Freescale Semiconductor 

Electrical and Thermal Characteristics

Figure 3 provides the SYSCLK input timing diagram.

SYSCLK

VM

VM

VM CVIL

CVIH

tKHKL

tKR

tKF

tSYSCLK

VM = Midpoint Voltage (OVDD/2)

Figure 3. SYSCLK Input Timing Diagram

5.2.2 Processor Bus AC Specifications

Table 9 provides the processor bus AC timing specifications for the MPC7448 as defined in Figure 4 and

Figure 5.

Table 9. Processor Bus AC Timing Specifications1

At recommended operating conditions. See Table 4.

Parameter

All Speed Grades

Symbol 2

Unit

Notes

Min

Max

Input setup times:

ns

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

tAVKH

1.5

—

—

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

tDVKH

1.5

—

—

AACK, ARTRY, BG, CKSTP_IN, DBG, DTI[0:3], GBL, TT[0:4],

tIVKH

1.5

—

—

QACK, TA, TBEN, TEA, TS, EXT_QUAL, PMON_IN,

SHD[0:1]

BMODE[0:1], BVSEL[0:1]

tMVKH

1.5

—

8

Input hold times:

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

tAXKH

0

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

tDXKH

0

AACK, ARTRY, BG, CKSTP_IN, DBG, DTI[0:3], GBL, TT[0:4],

tIXKH

0

QACK, TA, TBEN, TEA, TS, EXT_QUAL, PMON_IN,

SHD[0:1]

BMODE[0:1], BVSEL[0:1]

tMXKH

0

ns

—

—

—

—

—

—

—

—

8

Output valid times:

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

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

BR, CI, DRDY, GBL, HIT, PMON_OUT, QREQ, TBST,

TSIZ[0:2], TT[0:4], WT

TS

ARTRY, SHD[0:1]

tKHAV

—

tKHDV

—

tKHOV

—

tKHTSV

—

tKHARV

—

ns

1.8

1.8

1.8

1.8

1.8

Output hold times:

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

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

BR, CI, DRDY, GBL, HIT, PMON_OUT, QREQ, TBST,

TSIZ[0:2], TT[0:4], WT

TS

ARTRY, SHD[0:1]

ns

tKHAX

0.5

—

tKHDX

0.5

—

tKHOX

0.5

—

tKHTSX

0.5

—

tKHARX

0.5

—

SYSCLK to output enable

tKHOE

0.5

—

ns

5

MPC7448 RISC Microprocessor Hardware Specifications, Rev. 4

Freescale Semiconductor

17

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