C501_1 Datasheet, PDF (104/121 Pages) Siemens Semiconductor Group – 8-Bit Single-Chip Microcontroller

Device Specifications
C501
10.5 AC Characteristics for C501-L24 / C501-1R24 / C501-1E24
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
24 MHz
Clock
min. max.
Variable Clock
1/t_CLCL = 3.5 MHz to 24 MHz
min.
max.
t_LHLL
43 –
2t_CLCL – 40
–
ns
t_AVLL
17 –
t_CLCL – 25
–
ns
t_LLAX
17 –
t_CLCL – 25
–
ns
t_LLIV
–
80 –
4t_CLCL – 87
ns
t_LLPL
22 –
t_CLCL – 20
–
ns
t_PLPH
95 –
3t_CLCL – 30
–
ns
t_PLIV
–
60 –
3t_CLCL – 65
ns
t_PXIX
0
–
0
–
ns
t *)
PXIZ
–
32 –
t_CLCL – 10
ns
t *)
PXAV
37
–
t_CLCL – 5
–
ns
t_AVIV
–
148 –
5t_CLCL – 60
ns
t_AZPL
0
–
0
–
ns
*) Interfacing the C501 to devices with float times up to 37 ns is permissible. This limited bus contention will not
cause any damage to port 0 Drivers.
Semiconductor Group
10-7