ST10 STMICROELECTRONICS [STMicroelectronics], ST10 Datasheet - Page 52

• Manufacturer Part Number: ST10
• Description: 16-BIT MCU WITH 32K BYTE ROM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST10C167
XX - ELECTRICAL CHARACTERISTICS (continued)
XX.4.10 - Demultiplexed bus
V
C
C
ALE cycle time = 4 TCL + 2t
Table 19 : Demultiplexed bus characteristics
52/65
t
DD
t
L
L
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
20
21
t
t
t
t
12
13
14
15
16
17
18
22
24
26
28
38
39
41
42
Symbol
5
6
8
9
(for Port0, Port1, Port 4, ALE, RD, WR, BHE, CLKOUT) = 100pF,
(for Port 6, CS) = 100pF
1
1
= 5V
CC
CC
CC
CC
CC
CC
SR
SR
SR
SR
SR
SR
SR
CC
CC
CC
CC
CC
SR
CC
CC
10%, V
ALE high time
Address setup to ALE
ALE falling edge to RD, WR (with
RW-delay)
ALE falling edge to RD, WR (no
RW-delay)
RD, WR low time (with RW-delay)
RD, WR low time (no RW-delay)
RD to valid data in (with RW-delay)
RD to valid data in (no RW-delay)
ALE low to valid data in
Address/Unlatched CS to valid data
in
Data hold after RD rising edge
Data float after RD rising edge
(with RW-delay
Data float after RD rising edge
(no RW-delay
Data valid to WR
Data hold after WR
ALE rising edge after RD, WR
Address/Unlatched CS hold after
RD, WR
ALE falling edge to Latched CS
Latched CS low to Valid Data In
Latched CS hold after RD, WR
ALE falling edge to RdCS, WrCS
(with RW-delay)
SS
2
= 0V, T
Parameter
1
)
1
)
A
A
+ t
= -40 to +125 C
C
+ t
F
(80ns at 25MHz CPU clock without wait states)
-10 + t
-10 + t
10 + t
10 + t
30 + t
50 + t
20 + t
16 + t
10 + t
-4 - t
4 + t
0 + t
6 + t
Min.
Max. CPU Clock
–
–
–
–
0
–
–
–
A
F
A
F
A
A
C
C
C
F
A
A
F
= 25MHz
50 + 2t
40 + t
40 + t
20 + t
40 + t
26 + t
10 + t
10 - t
Max.
–
–
–
–
–
–
–
–
–
–
–
–
–
C
A
A
+ 2t
+ t
A
C
C
F
F
+ t
C
A
C
2TCL - 10 + t
3TCL - 10 + t
2TCL- 20 + t
TCL - 10 + t
TCL - 14 + t
TCL - 10+ t
TCL - 16+ t
TCL - 10+ t
TCL - 4 + t
-10 + t
-10 + t
-4 - t
0 + t
1/2TCL = 1 to 25MHz
Min.
Variable CPU Clock
–
–
–
–
0
–
–
–
F
A
A
F
A
A
A
F
A
F
C
C
C
2TCL - 20 + t
3TCL - 20 + t
+ t
+ t
3TCL - 20
4TCL - 30
+ 2t
2TCL - 14
3TCL - 20
+ t
TCL - 10
+ t
10 - t
F
F
Max.
C
A
A
+ 2t
+ 2t
–
–
–
–
–
–
–
–
–
–
–
–
–
+ 2t
+ t
+ t
A
C
A
A
C
A
2
2
C
C
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns