MPC8280ZQI データシートの表示（PDF） - Freescale Semiconductor

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MPC8280ZQI

PowerQUICC II Family Hardware Specifications

Freescale Semiconductor 

AC Electrical Characteristics

NOTE: Conditions

The following conditions must be met in order to operate the MPC8272

family devices with 133 MHz bus: single PowerQUICC II Bus mode must

be used (no external master, BCR[EBM] = 0); data bus must be in Pipeline

mode (BRx[DR] = 1); internal arbiter and memory controller must be used.

For expected load of above 40 pF, it is recommended that data and address

buses be configured to low (25 Ω) impedance (SIUMCR[HLBE0] = 1,

SIUMCR[HLBE1] = 1).

Table 11. AC Characteristics for SIU Inputs1

Spec Number

Value (ns)

Setup Hold

Characteristic

Setup

Hold

66 83 100 133 66 83 100 133

MHz MHz MHz MHz MHz MHz MHz MHz

sp11 sp10 AACK/TA/TS/DBG/BG/BR/ARTRY/TEA

6

5 3.5 N/A 0.5 0.5 0.5 N/A

sp12 sp10 Data bus in normal mode

5

4 3.5 N/A 0.5 0.5 0.5 N/A

sp13 sp10 Data bus in pipeline mode (without ECC and N/A 4 2.5 1.5 N/A 0.5 0.5 0.5

PARITY)

sp15 sp10 All other pins

5

4 3.5 N/A 0.5 0.5 0.5 N/A

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.

This table lists SIU output characteristics.

Table 12. AC Characteristics for SIU Outputs1

Spec Number

Value (ns)

Max Min

Characteristic

Maximum Delay

Minimum Delay

66 83 100 133 66 83 100 133

MHz MHz MHz MHz MHz MHz MHz MHz

sp31 sp30 PSDVAL/TEA/TA

sp32 sp30 ADD/ADD_atr./BADDR/CI/GBL/WT

sp33 sp30 Data bus3

7

6 5.5 N/A 1

1

1 N/A

8

6.5 5.5 4.52 1

1

1

12

6.5 6.5 5.5 4.5 0.8 0.8 0.8 1

sp34 sp30 Memory controller signals/ALE

6 5.5 5.5 4.5 1

1

1

1

sp35 sp30 All other signals

6 5.5 5.5 N/A 1

1

1 N/A

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.

2 Value is for ADD only; other sp32/sp30 signals are not applicable.

3 To achieve 1 ns of hold time at 66.67/83.33/100 MHZ, a minimum loading of 20 pF is required.

MPC8280 PowerQUICC II Family Hardware Specifications, Rev. 2

Freescale Semiconductor

21

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