参数资料
型号: MPC8308CVMAFDA
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: RISC MICROCONTROLLER, PBGA473
封装: 19 X 19 MM, 1.39 MM HEIGHT, 0.80 MM PITCH, LEAD FREE, PLASTIC, MABGA-473
文件页数: 40/90页
文件大小: 1123K
代理商: MPC8308CVMAFDA
MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 2
Freescale Semiconductor
45
Enhanced Local Bus
Figure 30 provides the AC test load for the local bus.
Figure 30. Local Bus AC Test Load
Local bus clock to output valid (Note: to be revisited)
tLBKHOV
—3
ns
3
Local bus clock to output high impedance for LD (Note: to be
revisited)
tLBKHOZ
—4
ns
5
Notes:
1. The symbols used for timing specifications follow the pattern of t(First two letters of functional block)(signal)(state) (reference)(state) for
inputs and t(First two letters of functional block)(reference)(state)(signal)(state) for outputs. For example, tLBIXKH1 symbolizes local bus
timing (LB) for the input (I) to go invalid (X) with respect to the time the tLBK clock reference (K) goes high (H), in this case
for clock one(1).
2. All timings are in reference to falling edge of LCLK0 (for all outputs and for LGTA and LUPWAIT inputs) or rising edge of
LCLK0 (for all other inputs).
3. All signals are measured from NVDD/2 of the rising/falling edge of LCLK0 to 0.4 × NVDD of the signal in question for 3.3-V
signaling levels.
4. Input timings are measured at the pin.
5. For purposes of active/float timing measurements, the Hi-Z or off state is defined to be when the total current delivered
through the component pin is less than or equal to the leakage current specification.
Table 37. Local Bus General Timing Parameters (continued)
Parameter
Symbol 1
Min
Max
Unit
Notes
Output
Z0 = 50 Ω
NVDD/2
RL = 50 Ω
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