SAB80515 Datasheet, PDF (254/270 Pages) Siemens Semiconductor Group – 8-Bit Single-Chip Microcontroller Family

Device Specifications
AC Characteristics (cont’d)
Parameter
Symbol
Limit values
Unit
12 MHz clock
min. max.
Variable clock
1/t_CLCL = 3.5 MHz to 12 MHz
min.
max.
External Data Memory Characteristics
RD pulse width
t _RLRH
400 –
6 t_CLCL – 100 ^–
ns
WR pulse width
t _WLWH 400 –
6 t_CLCL – 100 ^–
ns
Address hold after ALE t_LLAX2 132 –
2 t_CLCL – 35 ^–
ns
RD to valid data in
t_RLDV
–
252 ^–
5 t_CLCL – 165 ns
DATA hold after RD
t _RHDX
0
–
0
ns
Data float after RD
t _RHDZ
–
97
–
2 t_CLCL – 70 ns
ALE to valid data in
t _LLDV
–
517 ^–
8 t_CLCL – 150 ns
Address to valid data in t_AVDV
–
585 ^–
9 t_CLCL – 165 ns
ALE to WR or RD
t _LLWL
200 300 3 t_CLCL – 50 3 t_CLCL + 50 ns
WR or RD high to ALE t_WHLH 43
123 t_CLCL – 40
t_CLCL + 40
ns
high
Address valid to WR
t _AVWL
203 –
4 t_CLCL – 130 –
ns
Data valid to WR
t _QVWX
33
–
t_CLCL – 50
–
ns
transition
Data setup before WR t_QVWH 288 –
7 t_CLCL – 150 –
ns
Data hold after WR
t_WHQX 13
–
t_CLCL – 50
–
ns
Address float after RD t_RLAZ
–
0
–
0
ns
Semiconductor Group
254