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Emulation Timing Calculations
E-9
Design Considerations for Using XDS510 Emulator
In a multiprocessor application, it is necessary to ensure that the EMU0 and
EMU1 lines can go from a logic low level to a logic high level in less than 10
µs, this parameter is called rise time, t
r
. This can be calculated as follows:
t
r
= 5(R
pullup
× N
devices
× C
load_per_device
)
= 5(4.7 k × 16 × 15 pF)
= 5(4.7 × 10
3
× 16 × 15 = no
–12
F)
= 5(1128 × 10
–9
= 5.64 µs