SAB80C515A-5 Datasheet, PDF (100/108 Pages) Siemens Semiconductor Group – 8-Bit CMOS Single-Chip Microcontroller Family

SAB 80C515A/83C515A-5
AC Characteristics (cont’d)
Parameter
Symbol
Limit values
Unit
18 MHz clock
min max.
Variable clock
1/t_CLCL = 3.5 MHz to 18 MHz
min.
max.
External Data Memory Characteristics
RD pulse width
t _RLRH
233 –
6 t_CLCL – 100 ^–
ns
WR pulse width
t_WLWH 233 –
6 t_CLCL – 100 ^–
ns
Address hold after
t _LLAX2
81
–
2 t_CLCL – 30 ^–
ns
ALE
RD to valid data in
DATA hold after RD
Data float after RD
ALE to valid data in
Address to valid
data in
ALE to WR or RD
WR or RD high to
ALE high
t_RLDV
–
t _RHDX
0
t _RHDZ
–
t _LLDV
–
t _AVDV
–
128 ^–
–
0
51
–
294 ^–
335 ^–
5 t_CLCL – 150 ns
–
ns
2 t_CLCL – 60 ns
8 t_CLCL – 150 ns
9 t_CLCL – 165 ns
t _LLWL
117 217 3 t_CLCL– 50 3 t_CLCL + 50 ns
t _WHLH
16
96
t_CLCL– 40
t_CLCL + 40
ns
Address valid to WR
t _AVWL
92
–
4 t_CLCL – 130 –
ns
Data valid to WR
t _QVWX
11
–
t_CLCL – 45
–
ns
transition
Data setup before WR t_QVWH 239 –
7 t_CLCL – 150 –
ns
Data hold after WR
t _WHQX
16
–
t_CLCL – 40
–
ns
Address float after RD t_RLAZ
–
0
–
0
ns
Semiconductor Group
6-48