参数资料
型号: MPC8248CVRMIBA
厂商: Freescale Semiconductor
文件页数: 15/61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
22
Freescale Semiconductor
AC Electrical Characteristics
This figure shows PIO and timer signals.
Figure 8. PIO and Timer Signal Diagram
6.2
SIU AC Characteristics
This table lists SIU input characteristics.
NOTE: CLKIN Jitter and Duty Cycle
The CLKIN input to the SoC should not exceed +/– 150 psec of jitter
(peak-to-peak). This represents total input jitter—the combination of short
term (peak-to-peak) and long term (cumulative). The duty cycle of CLKIN
should not exceed the ratio of 40:60.
NOTE: Spread Spectrum Clocking
Spread spectrum clocking is allowed with 1% input frequency down-spread
at maximum 60 KHz modulation rate regardless of input frequency.
NOTE: PCI AC Timing
The SoC meets the timing requirements of PCI Specification Revision 2.2.
See Section 7, “Clock Configuration Modes,” and “Note: Tval (Output
Hold)” to determine if a specific clock configuration is compliant.
Sys clk
PIO/IDMA/TIMER[TGATE assertion] input signals
IDMA output signals
sp22
sp23
sp42/sp43
TIMER(sp42/43)/ PIO(sp42a/sp43a)
sp42a/sp43a
output signals
sp42/sp43
TIMER input signal [TGATE deassertion]
sp22
sp23
Note: TGATE is asserted on the rising edge of the clock; it is deasserted on the falling edge.
(See note)
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