參數(shù)資料
型號： MPC8280CZUUPEX
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 450 MHz, RISC PROCESSOR, PBGA480
封裝： 37.50 X 37.50 MM, 1.55 MM HEIGHT, 1.27 MM PITCH, TBGA-480
文件頁數(shù)： 15/80頁
文件大小： 536K
代理商： MPC8280CZUUPEX
MPC8280 PowerQUICC II Family Hardware Specifications, Rev. 1.8
22
Freescale Semiconductor
AC Electrical Characteristics
Figure 12 is a representation of the information in Table 13.
Figure 12. Internal Tick Spacing for Memory Controller Signals
NOTE
The UPM machine outputs change on the internal tick determined by the memory
controller programming; the AC specifications are relative to the internal tick. The
SDRAM and GPCM machine outputs change on CLKin’s rising edge.
6.3 JTAG Timings
Table 14 lists the JTAG timings.
Table 13. Tick Spacing for Memory Controller Signals
PLL Clock Ratio
Tick Spacing (T1 Occurs at the Rising Edge of CLKin)
T2
T3
T4
1:2, 1:3, 1:4, 1:5, 1:6
1/4 CLKin
1/2 CLKin
3/4 CLKin
1:2.5
3/10 CLKin
1/2 CLKin
8/10 CLKin
1:3.5
4/14 CLKin
1/2 CLKin
11/14 CLKin
Table 14. JTAG Timings1
Parameter
Symbol2
Min
Max
Unit
Notes
JTAG external clock frequency of operation
fJTG
0
33.3
MHz
JTAG external clock cycle time
tJTG
30
—
ns
JTAG external clock pulse width measured at 1.4V
tJTKHKL
15
—
ns
JTAG external clock rise and fall times
tJTGR and
tJTGF
05
ns
6
TRST assert time
tTRST
25
—
ns
3, 6
Input setup times
Boundary-scan data
TMS, TDI
tJTDVKH
tJTIVKH
4
—
ns
4, 7
CLKin
T1
T2
T3
T4
CLKin
T1
T2
T3
T4
for 1:2.5
for 1:3.5
CLKin
T1
T2
T3
T4
for 1:2, 1:3, 1:4, 1:5, 1:6
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