参数资料
型号: MPC8250AZQNJDX
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 291 MHz, RISC PROCESSOR, PBGA516
封装: 27 X 27 MM, 2.25 MM HEIGHT, 1 MM PITCH, PLASTIC, BGA-516
文件页数: 4/62页
文件大小: 945K
代理商: MPC8250AZQNJDX
MPC8250 Hardware Specifications, Rev. 2
12
Freescale Semiconductor
Electrical and Thermal Characteristics
2.4
AC Electrical Characteristics
The following sections include illustrations and tables of clock diagrams, signals, and CPM outputs and
inputs for the 66 MHz MPC8250 device. Note that AC timings are based on a 50-pf load. Typical output
buffer impedances are shown in Table 6.
Table 7 lists CPM output characteristics.
Table 8 lists CPM input characteristics.
Table 6. Output Buffer Impedances 1
1
These are typical values at 65° C. The impedance may vary by
±25% with process and temperature.
Output Buffers
Typical Impedance (
Ω)
60x bus
40
Local bus
40
Memory controller
40
Parallel I/O
46
PCI
25
Table 7. AC Characteristics for CPM Outputs 1
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
Max Delay (ns)
Min Delay (ns)
Max
Min
66 MHz 83 MHz 66 MHz 83 MHz
sp36a
sp37a
FCC outputs—internal clock (NMSI)
6
5.5
1
sp36b
sp37b
FCC outputs—external clock (NMSI)
14
12
2
1
sp40
sp41
TDM outputs/SI
25
16
5
4
sp38a
sp39a
SCC/SMC/SPI/I2C outputs—internal clock (NMSI)
19
16
1
0.5
sp38b
sp39b
Ex_SCC/SMC/SPI/I2C outputs—external clock (NMSI)
19
16
2
1
sp42
sp43
TIMER/IDMA outputs
14
11
1
0.5
sp42a
sp43a
PIO outputs
14
11
0.5
Table 8. AC Characteristics for CPM Inputs 1
Spec Number
Characteristic
Setup (ns)
Hold (ns)
Max
Min
66 MHz 83 MHz 66 MHz 83 MHz
sp16a
sp17a
FCC inputs—internal clock (NMSI)
10
8
0
sp16b
sp17b
FCC inputs—external clock (NMSI)
3
2.5
3
2
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