MPC8250ACZQIHBC Просмотр технического описания (PDF) - Freescale Semiconductor
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MPC8250ACZQIHBC Datasheet PDF : 62 Pages
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Electrical and Thermal Characteristics
Table 10 lists SIU output characteristics.
Table 10. AC Characteristics for SIU Outputs 1
Spec Number
Max
Min
Characteristic
Max Delay (ns) Min Delay (ns)
66 MHz 83 MHz 66 MHz 83 MHz
sp31
sp30 PSDVAL/TEA/TA
7
6
0.5
0.5
sp32
sp30 ADD/ADD_atr./BADDR/CI/GBL/WT
8
6.5
0.5
0.5
sp33a
sp30 Data bus
6.5
6.5
0.5
0.5
sp33b
sp30 DP
8
7
0.5
0.5
sp34
sp30 Memory controller signals/ALE
6
5
0.5
0.5
sp35
sp30 All other signals
6
5.5
0.5
0.5
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.
NOTE
Activating data pipelining (setting BRx[DR] in the memory controller)
improves the AC timing. When data pipelining is activated, sp12 can be
used for data bus setup even when ECC or PARITY are used. Also, sp33a
can be used as the AC specification for DP signals.
MPC8250 Hardware Specifications, Rev. 2
Freescale Semiconductor
17
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