参数资料
型号: MPC8314ECVRADDA
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: MICROPROCESSOR, PBGA620
封装: 29 X 29 MM, LEAD FREE, PLASTIC, TEPBGA-620
文件页数: 43/106页
文件大小: 1253K
代理商: MPC8314ECVRADDA
MPC8314E PowerQUICC II Pro Processor Hardware Specifications, Rev. 0
Freescale Semiconductor
41
Local Bus
Figure 23 provides the AC test load for the local bus.
Figure 23. Local Bus AC Test Load
Local bus clock to output valid
tLBKHOV
—3
ns
3
Local bus clock to output high impedance for LAD
tLBKHOZ
—4
ns
8
Notes:
1. The symbols used for timing specifications herein 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). Also, tLBKHOX symbolizes local bus timing (LB) for the tLBK clock reference (K) to go high (H), with respect
to the output (O) going invalid (X) or output hold time.
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. tLBOTOT1 should be used when RCWH[LALE] is not set and the load on LALE output pin is at least 10pF less than the load
on LAD output pins.
6. tLBOTOT2 should be used when RCWH[LALE] is set and the load on LALE output pin is at least 10pF less than the load on
LAD output pins.
7. tLBOTOT3 should be used when RCWH[LALE] is set and the load on LALE output pin equals to the load on LAD output pins.
8. For 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 44. 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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