PC8260 View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'PC8260' PDF : 53 Pages View PDF
AC Electrical Specifications
Included in this section are illustrations and tables of clock diagrams, signals, and CPM
outputs and inputs. Note that AC timings are based on a 50 pF load. Typical output
buffer impedances are shown in Table 9.
Table 9. Output Buffer Impedances
Output Buffers
Typical Impedance (Ω)
60x bus
40
Local bus
40
Memory Controller
40
Parallel I/O
46
PCI
25
Note: These are typical values at 65°C. The impedance may vary by ± 25% with process and
temperature.
Although the specifications generally refer to the rising edge of the clock, the following
AC timing diagrams also apply when the falling edge is the active edge.
Figure 4. FCC External Clock Diagram
Serial CLKin
FCC Input Signals
sp16b
FCC Output Signals
Figure 5. FCC Internal Clock Diagram
BRG_OUT
sp17b
sp36b/sp37b
sp17a
FCC Input Signals
sp16a
FCC Output Signals
sp36a/sp37a
40 PC8260 PowerQUICC II
2131B–HIREL–02/03
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