C505_9708 SIEMENS [Siemens Semiconductor Group], C505_9708 Datasheet - Page 213

• Manufacturer Part Number: C505_9708
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

10.5 AC Characteristics (20 MHz) for C505
(
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
*)
Semiconductor Group
V
C
CC
L
Interfacing the C505 to devices with float times up to 25 ns is permissible. This limited bus contention will not
cause any damage to port 0 drivers.
for port 0, ALE and PSEN outputs = 100 pF;
= 5 V + 10%, – 15%;
V
SS
= 0 V
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
LHLL
AVLL
LLAX
LLIV
LLPL
PLPH
PLIV
PXIX
PXIZ
PXAV
AVIV
AZPL
*)
*)
10-9
T
T
C
min.
35
10
10
–
10
60
–
0
–
20
–
- 5
A
A
20-MHz clock
L
Duty Cycle
= 0 to 70 C
= – 40 to 85 C
0.5 to 0.5
for all other outputs = 80 pF)
max.
–
–
–
55
–
–
25
–
20
–
65
–
Limit Values
min.
CLP - 15
TCL
TCL
–
TCL
CLP +
TCL
–
0
–
TCL
–
- 5
1/
Device Specifications
Hmin
Hmin
Lmin
Hmin
Lmin
Variable Clock
CLP
- 15 –
- 15 –
- 15 –
- 15
- 5
for the SAB-C505
for the SAF-C505
20 MHz
= 2 MHz to
max.
–
2 CLP - 45
–
CLP +
TCL
–
TCL
–
2 CLP +
TCL
–
C505 / C505C
Hmin
Lmin
Hmin
1997-08-01
- 5
- 50
- 60
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns