C505-2RM SIEMENS [Siemens Semiconductor Group], C505-2RM Datasheet - Page 74

• Manufacturer Part Number: C505-2RM
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

AC Characteristics (20 MHz, 0.5 Duty Cycle, cont’d)
External Data Memory Characteristics
Parameter
RD pulse width
WR pulse width
Address hold after ALE
RD to valid data in
Data hold after RD
Data float after RD
ALE to valid data in
Address to valid data in
ALE to WR or RD
Address valid to WR
WR or RD high to ALE high
Data valid to WR transition
Data setup before WR
Data hold after WR
Address float after RD
External Clock Drive Characteristics
Parameter
Oscillator period
High time
Low time
Rise time
Fall time
Oscillator duty cycle
Semiconductor Group
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
RLRH
WLWH
LLAX2
RLDV
RHDX
RHDZ
LLDV
AVDV
LLWL
AVWL
WHLH
QVWX
QVWH
WHQX
RLAZ
Symbol
CLP
TCL
TCL
t
t
DC
R
F
H
L
min.
120
120
35
–
0
–
–
–
60
70
10
5
125
5
–
0.5 Duty Cycle
20 MHz clock
74
min.
50
15
15
–
–
0.5
max.
–
–
–
75
–
38
150
150
90
–
40
–
–
–
0
Freq. = 2 MHz to 20 MHz
Limit Values
Variable Clock
min.
3 CLP - 30
3 CLP - 30
CLP - 15
–
0
–
–
–
3/2 CLP - 15
2 CLP - 30
CLP/2 - 15
CLP/2 - 20
7/2 CLP - 50
CLP/2 - 20
–
Limit Values
1/CLP = 2 MHz to 20 MHz
Variable Clock
max.
500
CLP-TCL
CLP-TCL
10
10
0.5
C505A / C505CA
max.
–
–
–
5/2 CLP- 50
–
CLP - 12
4 CLP - 50
9/2 CLP - 75
3/2 CLP + 15 ns
–
CLP/2 + 15
–
–
–
0
L
H
C505 / C505C
1997-12-01
Unit
ns
ns
ns
ns
ns
–
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns