參數(shù)資料
型號(hào)： MPC8245ARVV400D
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 400 MHz, RISC PROCESSOR, PBGA352
封裝： 35 X 35 MM, 1.65 MM HEIGHT, 1.27 MM PITCH, LEAD FREE, TBGA-352
文件頁數(shù)： 18/68頁
文件大?。?/td> 1143K
代理商： MPC8245ARVV400D
MPC8245 Integrated Processor Hardware Specifications, Rev. 9
Freescale Semiconductor
25
Electrical and Thermal Characteristics
Figure 15 provides the PCI_HOLD_DEL effect on output valid and hold times.
Figure 15. PCI_HOLD_DEL Effect on Output Valid and Hold Times
4.3.4
I2C AC Timing Specifications
Table 12 provides the I2C input AC timing specifications for the MPC8245 at recommended operating
conditions (see Table 2) with LVDD = 3.3 V ± 0.3 V.
Table 12. I2C Input AC Timing Specifications
Num
Characteristic
Min
Max
Unit
Notes
1
Start condition hold time
4.0
—
CLKs
1, 2
2
Clock low period
(time before the MPC8245 will drive SCL low as a
transmitting slave after detecting SCL low as
driven by an external master)
8.0 + (16
× 2FDR[4:2]) × (5 –
4({FDR[5],FDR[1]} == b’10) –
3({FDR[5],FDR[1]} == b’11) –
2({FDR[5],FDR[1]} == b’00) –
1({FDR[5],FDR[1]} == b’01))
—
CLKs
1, 2, 4, 5
PCI_SYNC_IN
PCI Inputs/Outputs
33 MHz PCI
12a2, 7.0 ns for 33 MHz PCI
PCI_HOLD_DEL = 10
12a0, 6.0 ns for 66 MHz PCI
PCI_HOLD_DEL = 00
13a2, 2.1 ns for 33-MHz PCI
PCI_HOLD_DEL = 10
13a0, 1 ns for 66-MHz PCI
PCI_HOLD_DEL = 00
Output Valid
Output Hold
Note: Diagram not to scale.
As PCI_HOLD_DEL
Values Decrease
PCI Inputs
and Outputs
PCI Inputs/Outputs
66 MHz PCI
PCI_HOLD_DEL = 00
As PCI_HOLD_DEL
Values Increase
OVDD/2
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