參數(shù)資料
型號(hào)： MC7455ARX867LG
廠商： MOTOROLA INC
元件分類(lèi)： 微控制器/微處理器
英文描述： 32-BIT, 867 MHz, RISC PROCESSOR, CBGA483
封裝： 29 X 29 MM, 1.27 MM PITCH, CERAMIC, BGA-483
文件頁(yè)數(shù)： 21/76頁(yè)
文件大?。?/td> 1520K
代理商： MC7455ARX867LG
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L3_CLK to high impedance: All
other outputs
tL3CHOZ
—2.0
ns
5
Notes:
1. Rise and fall times for the L3_CLK output are measured from 20% to 80% of GVDD.
2. All input specifications are measured from the midpoint of the signal in question to the midpoint voltage of the rising edge of the input L3_ECHO_CLKn (see
Figure 10). Input timings are measured at the pins.
3. All output specifications are measured from the midpoint voltage of the rising edge of L3_CLKn to the midpoint of the signal in question. The output timings are
measured at the pins. All output timings assume a purely resistive 50-
load (see Figure 10).
4. tL3_CLK/4 is one-fourth the period of L3_CLKn. This parameter indicates that the specified output signal is actually launched by an internal clock delayed in
phase by 90°. Therefore, there is a frequency component to the output valid and output hold times such that the specified output signal will be valid for
approximately one L3_CLK period starting three-fourths of a clock prior to the edge on which the SRAM will sample it and ending one-fourth of a clock period
after the edge it will be sampled.
5. Timing behavior and characterization are currently being evaluated.
6. These configuration bits allow the AC timing of the L3 interface to be altered via software. L3OH0 = L2CR[12], L30H1 = L3CR[12]. Revisions of the MPC7455
not described by this document may implement these bits differently. See Section 1.11.1, “Part Numbers Fully Addressed by This Document,” and
Section 1.11.2, “Part Numbers Not Fully Addressed by This Document,” for more information on which devices are addressed by this document.
Table 13. L3 Bus Interface AC Timing Specifications for PB2 and Late Write SRAMs (continued)
At recommended operating conditions. See Table 4.
Parameter
Symbol
All Speed Grades 6
Unit
Notes
L3OH0 = 0, L3OH1 = 0
L3OH0 = 0, L3OH1 =1
L3OH0 = 1, L3OH1 = 0 L3OH0 = 1, L3OH1 = 1
Min
Max
Min
Max
Min
Max
Min
Max
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