English
Language : 

C515A Datasheet, PDF (50/58 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller
C515A
AC Characteristics (24 MHz)
VCC = 5 V + 10%, – 15%; VSS = 0 V
TA = 0 to 70 °C
TA = – 40 to 85 °C
TA = – 40 to 110 °C
for the SAB-C515A
for the SAF-C515A
for the SAH-C515A
(CL for port 0, ALE and PSEN outputs = 100 pF; CL 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
Limit Values
Unit
24 MHz
Clock
min. max.
Variable Clock
1/tCLCL = 3.5 MHz to 24 MHz
min.
max.
tLHLL
43
tAVLL
17
tLLAX
17
tLLIV
–
tLLPL
22
tPLPH
95
tPLIV
–
tPXIX
0
t *)
PXIZ
–
t *)
PXAV
37
tAVIV
–
tAZPL
0
–
2 tCLCL – 40 –
ns
–
tCLCL – 25
–
ns
–
tCLCL – 25
–
ns
80 –
4 tCLCL – 87 ns
–
tCLCL – 20
–
ns
–
3tCLCL – 30
–
ns
60 –
3 tCLCL – 65 ns
–
0
–
ns
32 –
–
tCLCL – 5
148 –
–
0
tCLCL – 10
ns
–
ns
5 tCLCL – 60 ns
–
ns
*) Interfacing the C515A 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
50
1997-10-01