Revision 1.07 – September 10, 2007
PPC405EP – PowerPC 405EP Embedded Processor
Data Sheet
Table 12. Clocking Specifications
Symbol
CPU
Parameter
Min
Max
Units
133.33, 200, 266.66, or
333.33
PFC
PTC
Processor clock frequency
MHz
ns
Processor clock period
7.5, 5, 3.75 or 3
SysClk Input
SCFC
Frequency
25
100
40
MHz
ns
SCTC
SCTCS
SCTCH
SCTCL
Period
10
Edge stability (phase jitter, cycle to cycle)
Input high time
–
±0.15
ns
40% of nominal period
40% of nominal period
60% of nominal period
60% of nominal period
ns
Input low time
ns
Note: Input slew rate > 2V/ns
MemClkOut Output
MCOFC
MCOTC
PLBFC
Frequency
MHz
ns
1/PLBFC
–
Period
MCOTCS
MCOTCH
MCOTCL
Edge stability (phase jitter, cycle to cycle)
Output high time
±0.2
ns
45% of nominal period
45% of nominal period
55% of nominal period
55% of nominal period
ns
Output low time
ns
TrcClk Output
TCFC
PFC/2
PTCx2
Clock output frequency
Clock period
MHz
ns
TCTC
TCTCS
TCTCH
TCTCL
Clock edge stability (phase jitter, cycle to cycle)
Clock output high time
± 0.2
ns
45% of nominal period
45% of nominal period
55% of nominal period
55% of nominal period
ns
Clock output low time
ns
Other Clocks
VCOFC
VCO frequency @ PFC = 133, 200, or 266MHz
VCO frequency @ PFC = 333MHz
PLB frequency @ PFC = 266.66MHz
PLB frequency @ PFC = 333.33MHz
PLB frequency @ PFC = 200MHz
500
500
1000
1333
133.33
111.11
100
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
VCOFC
PLBFC
PLBFC
PLBFC
OPBFC
OPBFC
OPBFC
OPBFC
66.66
55.55
50
OPB frequency @ PFC = 133.33MHz
OPB frequency @ PFC = 266.66MHz
OPB frequency @ PFC = 333.33MHz
OPB frequency @ PFC = 200MHz
8.33
16.66
13.87
12.5
66.66
66.66
55.55
50
Figure 4. Clocking Waveform
2.0V
1.5V
0.8V
T
T
CL
CH
T
C
AMCC
41
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
