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
µ
s, 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
W
×
16
×
15 pF)
= 5(4.7
×
10
3
W
×
16
×
15 = no
–12
F)
= 5(1128
×
10
–9
)
= 5.64
µ
s
