參數(shù)資料
型號: MPC8275VR
廠商: Motorola, Inc.
英文描述: PowerQUICC II Family Hardware Specifications
中文描述: 的PowerQUICC II系列硬件規(guī)格
文件頁數(shù): 22/76頁
文件大小: 496K
代理商: MPC8275VR
22
MPC8280 PowerQUICC II Family Hardware Specifications
MOTOROLA
AC Electrical Characteristics
Figure 10 shows signal behavior for all parity modes (including ECC, RMW parity, and standard parity).
Figure 10. Parity Mode Diagram
Figure 11 shows signal behavior in MEMC mode.
Figure 11. MEMC Mode Diagram
NOTE
Generally, all MPC8280 bus and system output signals are driven from the
rising edge of the input clock (CLKin). Memory controller signals,
however, trigger on four points within a CLKin cycle. Each cycle is
divided by four internal ticks: T1, T2, T3, and T4. T1 always occurs at the
rising edge, and T3 at the falling edge, of CLKin. However, the spacing of
T2 and T4 depends on the PLL clock ratio selected, as shown in Table 13.
CLKin
DATA bus, ECC, and PARITY mode
Pipeline mode—
DP mode input signal
DP mode output signal
sp13
sp10
sp14a
sp10
Pipeline mode—
sp10
DP mode input signal
sp14
sp10
DATA bus, ECC, and PARITY mode
input signals
input signals
sp30
sp33b
sp13a
CLKin
V_CLK
Memory controller signals
sp34/sp30
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