参数资料
型号: MPC8248CZQTIEA
厂商: Freescale Semiconductor
文件页数: 11/61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: 400MHz
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
Freescale Semiconductor
19
AC Electrical Characteristics
This table lists CPM input characteristics.
NOTE: Rise/Fall Time on CPM Input Pins
It is recommended that the rise/fall time on CPM input pins should not
exceed 5 ns. This should be enforced especially on clock signals. Rise time
refers to signal transitions from 10% to 90% of VCC; fall time refers to
transitions from 90% to 10% of VCC.
NOTE
Although the specifications generally reference the rising edge of the clock,
the following AC timing diagrams also apply when the falling edge is the
active edge.
This figure shows the FCC internal clock.
Figure 3. FCC Internal Clock Diagram
Table 11. AC Characteristics for CPM 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
133
MHz
66
MHz
83
MHz
100
MHz
133
MHz
sp16a sp17a FCC inputs—internal clock (NMSI)
6
6660000
sp16b sp17b FCC inputs—external clock (NMSI)
2.5
2222
sp18a sp19a SCC/SMC/SPI/I2C inputs—internal clock (NMSI)
6
6660000
sp18b sp19b SCC/SMC/SPI/I2C inputs—external clock (NMSI)
4
4442222
sp20
sp21
TDM inputs/SI
3
2.5
sp22
sp23
PIO/TIMER/IDMA inputs
8
0.5
BRG_OUT
FCC input signals
FCC output signals
Note: When GFMR.[TCI] = 1
Note: When GFMR[TCI] = 0
sp36a/sp37a
sp17a
sp16a
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