C504 Datasheet, PDF (43/49 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

C504
AC Characteristics for C504-L40 / C504-2R40
V_CC = 5 V + 10 %, – 15 %; V_SS = 0 V
T_A = 0 to 70 °C
for the SAB-C504
T_A = – 40 to 85 °C
for the SAF-C504
(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
40-MHz clock
Variable Clock
1/t_CLCL = 3.5 MHz to
40 MHz
min. max. min.
max.
t_LHLL
35
–
t_AVLL
10
–
t_LLAX
10
–
t_LLIV
–
55
t_LLPL
10
–
t_PLPH
60
–
t_PLIV
–
25
t_PXIX
0
–
t *)
PXIZ
–
20
t *)
PXAV
20
–
t_AVIV
–
65
t_AZPL
–5 –
2t_CLCL – 15
t_CLCL – 15
t_CLCL – 15
–
t_CLCL – 15
3t_CLCL – 15
–
0
–
t_CLCL – 5
–
–5
–
–
–
4t_CLCL – 45
–
–
3t_CLCL – 50
–
t_CLCL – 5
–
5t_CLCL – 60
–
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
*) _{Interfacing the C504 to devices with float times up to 25 ns is permissible. This limited bus contention will not}
cause any damage to port 0 drivers.
Semiconductor Group
43