st10f269z1 STMicroelectronics, st10f269z1 Datasheet - Page 168

• Manufacturer Part Number: st10f269z1
• Description: St10f269 16-bit Mcu With Mac Unit, 256k Byte Flash Memory And 12k Byte Ram
• Manufacturer: STMicroelectronics

21.4.12 - CLKOUT and READY
V
Table 50 : CLKOUT and READY Characteristics (PQFP144 devices)
Notes: 1. These timings are given for test purposes only, in order to assure recognition at a specific clock edge.
168/184
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
= 5V
2. Demultiplexed bus is the worst case. For multiplexed bus 2TCL are to be added to the maximum values. This adds even more time
for deactivating READY.
The 2t
CC
CC
CC
CC
CC
CC
SR
SR
SR
SR
SR
SR
A
and t
10%, V
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 (Demultiplexed
Bus)
C
refer to the next following bus cycle, t
SS
Parameter
= 0V, T
A
= -40 to + 125°C, C
1)
1)
2)
Minimum
-2 + t
Maximum CPU Clock
12.5
12.5
F
25
35
refers to the current bus cycle.
4
3
–
–
2
2
0
A
= 40 MHz
L
= 50pF, PQFP144 devices
0 + 2t
Maximum
8 + t
A
25
+ t C + t
2)
–
–
4
4
–
–
–
–
–
A
F
2TCL + 10
Minimum
TCL – 8.5
TCL – 9.5
-2 + t
2TCL
1/2TCL = 1 to 40 MHz
12.5
12.5
Variable CPU Clock
–
–
2
2
0
A
+ 2t
TCL - 12.5
Maximum
A
8 + t
2TCL
+ t C + t
–
–
4
4
–
–
–
–
–
A
ST10F269
F
2)
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns