参数资料
型号: MPC8248CVRMIBA
厂商: Freescale Semiconductor
文件页数: 10/61页
文件大小: 0K
描述: IC MPU POWERQUICC II 516-PBGA
标准包装: 40
系列: MPC82xx
处理器类型: 32-位 MPC82xx PowerQUICC II
速度: 266MHz
电压: 1.5V
安装类型: 表面贴装
封装/外壳: 516-BBGA
供应商设备封装: 516-FPBGA(27x27)
包装: 托盘
MPC8272 PowerQUICC II Family Hardware Specifications, Rev. 3
18
Freescale Semiconductor
AC Electrical Characteristics
6
AC Electrical Characteristics
The following sections include illustrations and tables of clock diagrams, signals, and CPM outputs and
inputs for 66.67/83.33/100/133 MHz devices. Note that AC timings are based on a 50-pf load for MAX
Delay and 10-pf load for MIN delay. Typical output buffer impedances are shown in this table.
6.1
CPM AC Characteristics
This table lists CPM output characteristics.
Table 9. Output Buffer Impedances1
1 These are typical values at 65° C. Impedance may vary by ±25% with
process and temperature.
Output Buffers
Typical Impedance (
Ω)
60x bus
45 or 272
2 Impedance value is selected through SIUMCR[20,21]. See the SoC
reference manual.
Memory controller
45 or 272
Parallel I/O
45
PCI
27
Table 10. AC Characteristics for CPM 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
133
MHz
66
MHz
83
MHz
100
MHz
133
MHz
sp36a sp37a FCC outputs—internal clock (NMSI)
6
5.5
0.5
sp36b sp37b FCC outputs—external clock (NMSI)
8
8882
222
sp38a sp39a SCC/SMC/SPI/I2C outputs—internal clock (NMSI)
10
0
sp38b sp39b SCC/SMC/SPI/I2C outputs—external clock (NMSI)
8
8882
222
sp40
sp41
TDM outputs/SI
11
2.5
sp42
sp43
TIMER/IDMA outputs
11
0.5
sp42a sp43a PIO outputs
11
0.5
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