C501 Datasheet, PDF (33/48 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

C501
AC Characteristics for C501-L / C501-1R / C501-1E
V_CC = 5 V + 10 %, – 15 %; V_SS = 0 V T_A = 0 ˚C to 70 ˚C for the SAB-C501
T_A = – 40 ˚C to 85 ˚C for the SAF-C501
(C_L for port 0, ALE and PSEN outputs = 100 pF; C_L for all other outputs = 80 pF)
Program Memory Characteristics
Parameter
ALE pulse width
Address setup to ALE
Address hold after ALE
ALE low to valid instr in
ALE to PSEN
PSEN pulse width
PSEN to valid instr in
Input instruction hold after PSEN
Input instruction float after PSEN
Address valid after PSEN
Address to valid instr in
Address float to PSEN
Symbol
Limit Values
Unit
12 MHz
Clock
min. max.
Variable Clock
1/t_CLCL = 3.5 MHz to 12 MHz
min.
max.
t_LHLL
t_AVLL
t_LLAX
t_LLIV
t_LLPL
t_PLPH
t_PLIV
t_PXIX
t ^*)
PXIZ
t *)
PXAV
t_AVIV
t_AZPL
127 –
2t_CLCL – 40
43 –
t_CLCL – 40
30 –
t_CLCL – 53
–
233 –
58 –
t_CLCL – 25
215 –
3t_CLCL – 35
–
150 –
0
–
0
–
63 –
75 –
t_CLCL – 8
–
302 –
0
–
0
–
ns
–
ns
–
ns
4t_CLCL – 100 ns
–
ns
–
ns
3t_CLCL – 100 ns
–
ns
t_CLCL – 20
ns
–
ns
5t_CLCL – 115 ns
–
ns
*) Interfacing the C501 to devices with float times up to 75 ns is permissible. This limited bus contention will not
cause any damage to port 0 Drivers.
Semiconductor Group
33
1997-04-01