IA186EB/IA188EB
8-Bit/16-Bit Microcontrollers
Data Sheet
July 10, 2011
Table 17. Relative Timing Characteristics
Symbol
t
LHLL
t
AVLL
t
PLLL
t
LLAX
t
LLWL
t
LLRL
t
WHLH
t
AFRL
t
RLRH
t
WLWH
t
RHAV
t
WHDX
t
WHPH
t
RHPH
t
PHPL
t
OVRH
t
RHOX
Parameter
ale Rising to ale Falling
Address Valid to ale Falling
Chip Selects Valid to ale Falling
Address Hold from ale Falling
ale Falling to wr_n Falling
ale Falling to rd_n Falling
wr_n Rising to ale Rising
Address Float to rd_n Falling
rd_n Falling to rd_n Rising
wr_n Falling to wr_n Rising
rd_n Rising to Address Active
Output Data Hold after wr_n Rising
wr_n Rising to Chip Select Rising
rd_n Rising to Chip Select Rising
cs_n inactive to cs_n active
once_n Active to resin_n Rising
once_n Hold to resin_n Rising
Min
t – 15
½t –10
½t –10
½t –10
½t –15
½t –15
½t –10
0
(2t) – 5
(2t) – 5
t – 15
t – 15
½t –10
½t –10
½t –10
t
t
Max
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Ns
5.1
AC Test Conditions
The AC specifications are tested with the 50-pF load shown in Figure 15. Specifications are
measured at the V
CC
/2 crossing point unless otherwise specified.
Figure 15. AC Test Load
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