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SAFC161RI Datasheet(PDF) 44 Page - Siemens Semiconductor Group

Part # SAFC161RI
Description  16-Bit CMOS Single-Chip Microcontroller
PDF  60 Pages
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Manufacturer  SIEMENS [Siemens Semiconductor Group]
Direct Link  http://www.siemens.com/
Logo SIEMENS - Siemens Semiconductor Group

SAFC161RI Datasheet(HTML) 44 Page - Siemens Semiconductor Group

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Semiconductor Group
44
1998-05-01
C161RI
Memory Cycle Variables
The timing tables below use three variables which are derived from the BUSCONx registers and
represent the special characteristics of the programmed memory cycle. The following table
describes, how these variables are to be computed.
AC Characteristics
Multiplexed Bus
V
DD = 4.5 - 5.5 V;
V
SS = 0 V
T
A = 0 to + 70 °C
for SAB-C161RI
T
A = – 40 to + 85 °C
for SAF-C161RI
C
L = 100 pF
ALE cycle time = 6 TCL + 2
t
A + tC + tF (186 ns at 16 MHz CPU clock without waitstates)
Description
Symbol
Values
ALE Extension
t
A
TCL
× <ALECTL>
Memory Cycle Time Waitstates
t
C
2TCL
× (15 - <MCTC>)
Memory Tristate Time
t
F
2TCL
× (1 - <MTTC>)
Parameter
Symbol
Max. CPU Clock
= 16 MHz
Variable CPU Clock
1/2TCL = 1 to 16 MHz
Unit
min.
max.
min.
max.
ALE high time
t
5
CC
21 +
t
A
–
TCL - 10 +
t
A
–ns
Address setup to ALE
t
6
CC
15 +
t
A
–
TCL - 16 +
t
A
–ns
Address hold after ALE
t
7
CC
21 +
t
A
–
TCL - 10 +
t
A
–ns
ALE falling edge to RD,
WR (with RW-delay)
t
8
CC
21 +
t
A
–
TCL - 10 +
t
A
–ns
ALE falling edge to RD,
WR (no RW-delay)
t
9
CC
– 10 +
t
A
–
– 10 +
t
A
–ns
Address float after RD,
WR (with RW-delay)
t
10
CC
–6–
6
ns
Address float after RD,
WR (no RW-delay)
t
11
CC
–37
–
TCL + 6
ns
RD, WR low time
(with RW-delay)
t
12
CC
53 +
t
C
–
2TCL - 10
+
t
C
–ns
RD, WR low time
(no RW-delay)
t
13
CC
84 +
t
C
–
3TCL - 10
+
t
C
–ns



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