C515C Datasheet, PDF (61/69 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

C515C
External Data Memory Characteristics
Parameter
RD pulse width
WR pulse width
Address hold after 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
Address valid to WR
WR or RD high to ALE high
Data valid to WR transition
Data setup before WR
Data hold after WR
Address float after RD
Symbol
Limit Values
Unit
10-MHz
clock
Duty Cycle
0.4 to 0.6
Variable Clock
1/CLP= 2 MHz to 10 MHz
t_RLRH
t_WLWH
t_LLAX2
t_RLDV
t_RHDX
t_RHDZ
t_LLDV
t_AVDV
t_LLWL
t_AVWL
t_WHLH
t_QVWX
t_QVWH
t_WHQX
t_RLAZ
min.
230
230
48
–
0
–
–
–
90
103
15
5
218
13
–
max.
–
–
–
150
80
267
285
190
–
65
–
–
–
0
min.
max.
3 CLP - 70 –
ns
3 CLP - 70 –
ns
CLP - 15
–
ns
–
2 CLP+
ns
TCL_Hmin - 90
0
–
ns
–
CLP - 20
ns
–
4 CLP - 133 ns
–
CLP +
TCL_Lmin - 50
2 CLP - 97
4 CLP +
ns
TCL_Hmin -155
CLP+
ns
TCL_Lmin+ 50
–
ns
TCL_Hmin - 25 TCL_Hmin + 25 ns
TCL_Lmin - 35 –
ns
3 CLP +
–
ns
TCL_Lmin - 122
TCL_Hmin - 27 –
ns
–
0
ns
Semiconductor Group
61
1997-07-01