83C166 Siemens Semiconductor Group, 83C166 Datasheet - Page 35

• Manufacturer Part Number: 83C166
• Description: 16-Bit CMOS Single-Chip Microcontroller
• Manufacturer: Siemens Semiconductor Group

AC Characteristics
External Clock Drive XTAL1
V
T
T
Parameter
Oscillator period
High time
Low time
Rise time
Fall time
Figure 11
External Clock Drive XTAL1
Memory Cycle Variables
The timing tables below use three variables which are derived from registers SYSCON and
BUSCON1 and represent the special characteristics of the programmed memory cycle. The
following table describes, how these variables are to be computed.
Description
ALE Extension
Memory Cycle Time Waitstates
Memory Tristate Time
Semiconductor Group
A
A
CC
= 0 to +70 ˚C
= -40 to +85 ˚C
= 5 V
10 %;
V
for SAB 83C166-5M, SAB 80C166-M
for SAB 83C166-5M-T3, SAB 80C166-M-T3
SS
= 0 V
Symbol
TCL SR 25
t
t
t
t
1
2
3
4
SR 6
SR 6
SR –
SR –
min.
Symbol Values
t
t
t
A
C
F
Max. CPU Clock
= 20 MHz
34
TCL * <ALECTL>
2TCL * (15 - <MCTC>)
2TCL * (1 - <MTTC>)
max.
–
–
5
5
25
min.
6
6
–
–
25
1/2TCL = 1 to 20 MHz
Variable CPU Clock
SAB 80C166/83C166
–
–
5
5
max.
500
Unit
ns
ns
ns
ns
ns