ST10R272L STMicroelectronics, ST10R272L Datasheet - Page 66

• Manufacturer Part Number: ST10R272L
• Description: 16-BIT Romless MCU WITH MAC UNIT
• Manufacturer: STMicroelectronics

Specifications of ST10R272L

• Cpu Frequency: 0 to 50 MHz
• Power: 3.3 Volt +/-0.3V

ST10R272L - ELECTRICAL CHARACTERISTICS
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1
V
Parameter
CLKOUT cycle time
CLKOUT high time
CLKOUT low time
CLKOUT rise time
CLKOUT fall time
CLKOUT rising edge to
ALE falling edge
Synchronous READY
setup time to CLKOUT
Synchronous READY
hold time after CLKOUT
Asynchronous READY
low time
Asynchronous READY
setup time
Asynchronous READY
hold time
Async. READY hold time
after RD, WR high (Demulti-
plexed Bus)
DD
1) Measured between 0.3 and 2.7 volts
2) These timings assure recognition at a specific clock edge for test purposes only.
3) Demultiplexed bus is the worst case. For multiplexed bus, 2TCL should be added
= 3.3 V
to the maximum values. This adds even more time for deactivating READY.
2t
2
CLKOUT and READY/READY
A
2)
and t
3)2
0.3 V
C
1
1)
refer to the following bus cycle, t
V
SS
Table 19 CLKOUT and READY/READY
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
29
30
31
32
33
34
35
36
37
58
59
60
= 0 V
CC 20
CC 5
CC 5
CC –
CC –
CC -3 +
SR 9
SR 0
SR 27
SR 9
SR 0
SR 0
Max. CPU Clock
= 50 MHz
min.
t
A
T
max.
20
–
–
3
3
5 +
–
–
–
–
–
0
+ 2
A
1
1
= -40 to +85 °C
t
t
A
F
A
+
refers to the current bus cycle.
t
c
+
t
F
3
Variable CPU Clock
1/2TCL = 1 to 50 MHz
min.
2TCL
TCL – 5
TCL – 5
–
–
-3 +
9
0
2TCL + 7
9
0
0
t
A
C
L
= 50 pF
max.
2TCL
–
–
3
3
5 +
–
–
–
–
–
TCL - 10
+ 2
1
1
t
t
A
A
+
t
c
+
t
F
3
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns