MPC8270VR datasheet(22/83 Pages) FREESCALE

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MPC8280 PowerQUICC II Family Hardware Specifications, Rev. 2

Freescale Semiconductor

AC Electrical Characteristics

NOTE

Activating data pipelining (setting BRx[DR] in the memory controller)

improves the AC timing.

This table lists SIU input characteristics.

This table lists SIU output characteristics.

Table 13. AC Characteristics for SIU Inputs1

1 Input specifications are measured from the 50% level of the signal to the 50% level of the rising edge of CLKIN. Timings are

measured at the pin.

Spec Number

Characteristic

Value (ns)

Setup

Hold

Setup

Hold

66 MHz

83 MHz

100 MHz

66 MHz

83 MHz

100 MHz

sp11

sp10

AACK/TA/TS/DBG/BG/BR/ARTRY/

TEA

3.5

0.5

sp12

sp10

Data bus in normal mode

3.5

0.5

sp13

sp10

Data bus in ECC and PARITY modes

3.5

0.5

sp13a

sp10

Pipeline mode—Data bus (with or without

ECC/PARITY)

2.5

0.5

sp14

sp10

DP pins

3.5

0.5

sp14a

sp10

Pipeline mode—DP pins

—

2.5

—

0.5

sp15

sp10

All other pins

3.5

0.5

Table 14. AC Characteristics for SIU Outputs1

1 Output specifications are measured from the 50% level of the rising edge of CLKIN to the 50% level of the signal. Timings are

measured at the pin.

Spec Number

Characteristic

Value (ns)

Max

Min

Maximum Delay

Minimum Delay

66 MHz

83 MHz

100 MHz

66 MHz

83 MHz

100 MHz

sp31

sp30

PSDVAL/TEA/TA

5.5

sp32

sp30

ADD/ADD_atr./BADDR/CI/GBL/WT

6.5

5.5

sp33a

sp30

Data bus2

2 To achieve 1 ns of hold time at 66, 83, or 100 MHz, a minimum loading of 20 pF is required.

6.5

5.5

0.7

sp33b

sp30

5.5

sp34

sp30

Memory controller signals/ALE

5.5

sp35

sp30

All other signals

5.5

sp35a

sp30

7771

MPC8270VR Datasheet(PDF) 22 Page - Freescale Semiconductor, Inc

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