st10f273m STMicroelectronics, st10f273m Datasheet - Page 170

• Manufacturer Part Number: st10f273m
• Description: 16-bit Mcu With 512 Kbyte Flash Memory And 36 Kbyte Ram
• Manufacturer: STMicroelectronics

Electrical characteristics
24.8.18
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CLKOUT and READY
V
Table 73.
1. These timings are given for characterization purposes only, in order to assure recognition at a specific
2. Demultiplexed bus is the worst case. For multiplexed bus 2TCL are to be added to the maximum values.
t
t
t
t
t
t
t
t
t
t
t
t
29
30
31
32
33
34
35
36
37
58
59
60
DD
Symbol
clock edge.
This adds even more time for deactivating READY. 2t
to the current bus cycle.
= 5V ± 10%, V
CC CLKOUT cycle time
CC CLKOUT high time
CC CLKOUT low time
CC CLKOUT rise time
CC CLKOUT fall time
CC
SR
SR
SR
SR
SR
SR
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
(Demultiplexed bus)
CLKOUT and READY timings
Parameter
SS
(1)
(1)
= 0V, T
(2)
A
= -40 to + 125°C, CL = 50pF
– 2 + t
Min
25
10
17
35
17
9
–
–
2
2
0
f
TCL = 12.5ns
CPU
A
A
= 40 MHz
and t
2t
A
8 + t
Max
+ t
C
25
–
–
4
4
–
–
–
–
–
refer to the next following bus cycle, t
C
A
+ t
F
2TCL + 10
TCL – 3.5
TCL – 2.5
1/2 TCL = 1 to 40 MHz
– 2 + t
2TCL
Variable CPU clock
Min
17
17
–
–
2
2
0
A
2t
A
2TCL
8 + t
Max
+ t
–
–
4
4
–
–
–
–
–
ST10F273M
C
A
+ t
F
refers
F
Unit
ns