C517A Datasheet, PDF (59/67 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

C517A
AC Characteristics (24 MHz)
V_CC = 5 V + 10%, – 15%; V_SS = 0 V
T_A = 0 to 70 °C
T_A = – 40 to 85 °C
T_A = – 40 to 110 °C
for the SAB-C517A
for the SAF-C517A
for the SAH-C517A
(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 instruction in
ALE to PSEN
PSEN pulse width
PSEN to valid instruction 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
24 MHz
Clock
min. max.
t_LHLL
43
t_AVLL
17
t_LLAX
17
t_LLIV
–
t_LLPL
22
t_PLPH
95
t_PLIV
–
t_PXIX
0
t *)
PXIZ
–
t *)
PXAV
37
t_AVIV
–
t_AZPL
0
–
–
–
80
–
–
60
–
32
–
148
–
Limit Values
Variable Clock
1/t_CLCL = 3.5 MHz to 24 MHz
min.
max.
2 t_CLCL – 40
t_CLCL – 25
t_CLCL – 25
–
t_CLCL – 20
3t_CLCL – 30
–
0
–
–
–
4 t_CLCL – 87
–
–
3 t_CLCL – 65
–
–
t_CLCL – 5
–
0
t_CLCL – 10
–
5 t_CLCL – 60
–
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
*) _{Interfacing the C517A 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
59
1997-10-01