ST10F272B_12 STMICROELECTRONICS [STMicroelectronics], ST10F272B_12 Datasheet - Page 165

• Manufacturer Part Number: ST10F272B_12
• Description: 16-bit MCU with 256 Kbyte Flash memory and 12/20 Kbyte RAM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST10F272B/ST10F272E
Table 78.
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
39
40
42
43
44
45
46
47
48
49
50
51
52
54
56
Symbol
SR
CC
CC
CC
CC
CC
SR
SR
CC
CC
CC
SR
SR
CC
CC
Multiplexed bus timings (continued)
Latched CS low to Valid Data
In
Latched CS hold after RD, WR
ALE fall. edge to RdCS, WrCS
(with RW delay)
ALE fall. edge to RdCS, WrCS
(no RW delay)
Address float after RdCS,
WrCS (with RW
Address float after RdCS,
WrCS (no RW
RdCS to Valid Data In
(with RW delay)
RdCS to Valid Data In
(no RW delay)
RdCS, WrCS Low Time
(with RW delay)
RdCS, WrCS Low Time
(no RW delay)
Data valid to WrCS
Data hold after RdCS
Data float after
Address hold after
RdCS, WrCS
Data hold after WrCS
Parameter
delay)1
RdCS1
delay)1
– 5.5 + t
15.5 + t
Doc ID 11917 Rev 3
28 + t
10 + t
27 + t
7 + t
6 + t
6 + t
min.
F
–
–
–
–
–
0
–
TCL = 12.5 ns
CPU
A
F
F
C
C
F
C
A
= 40 MHz
16.5 + t
16.5 + t
16.5 + t
4 + t
max.
+ 2t
1.5
14
–
–
–
–
–
–
–
–
–
A
C
C
C
F
+
3TCL – 10.5 + t
2TCL – 9.5 + t
3TCL – 9.5 + t
2TCL – 15 + t
2TCL – 19 + t
2TCL – 19 + t
TCL – 5.5 + t
– 5.5 + t
min.
1/2 TCL = 1 to 64MHz
Variable CPU Clock
–
–
–
–
–
0
–
A
Electrical characteristics
A
C
F
F
C
C
F
2TCL – 8.5 + t
2TCL – 21 + t
3TCL – 21 + t
3TCL – 21 +
TCL + 1.5
+ t
max.
C
1.5
–
–
–
–
–
–
–
–
–
+ 2t
A
C
C
F
165/188
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns