参数资料
型号: ST10F269Z2Q3
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP144
封装: 28 X 28 MM, PLASTIC, QFP-144
文件页数: 54/160页
文件大小: 1541K
代理商: ST10F269Z2Q3
ST10F269
147/160
21.4.11 - Demultiplexed Bus
VDD = 5V ± 10%, VSS = 0V, TA = -40 to +125°C, CL = 50pF,
ALE cycle time = 4 TCL + 2tA + tC + tF (50ns at 40MHz CPU clock without wait states).
Table 36 : Demultiplexed Bus Characteristics
Symbol
Parameter
Maximum CPU Clock
= 40MHz
Variable CPU Clock
1/2 TCL = 1 to 40MHz
Unit
Minimum
Maximum
Minimum
Maximum
t5
CC
ALE high time
4 + tA
TCL - 8.5 + tA
–ns
t6
CC
Address setup to ALE
2 + tA
TCL - 10.5 + tA
–ns
t80 CC Address/Unlatched CS setup to
RD, WR
(with RW-delay)
16.5 + 2tA
2 TCL - 8.5 + 2tA
–ns
t81 CC Address/Unlatched CS setup to
RD, WR
(no RW-delay)
4 + 2tA
TCL - 8.5 + 2tA
–ns
t12 CC RD, WR low time
(with RW-delay)
15.5 + tC
2 TCL - 9.5 + tC
–ns
t13 CC RD, WR low time
(no RW-delay)
28 + tC
3 TCL - 9.5 + tC
–ns
t14 SR
RD to valid data in
(with RW-delay)
–6 + tC
2 TCL - 19 + tC
ns
t15 SR
RD to valid data in
(no RW-delay)
18.5 + tC
3 TCL - 19 + tC
ns
t16 SR
ALE low to valid data in
18.5 + tA +
tC
3 TCL - 19
+ tA + tC
ns
t17 SR
Address/Unlatched CS to valid
data in
22 + 2tA +
tC
4 TCL - 28
+ 2tA + tC
ns
t18 SR
Data hold after RD
rising edge
0–
0
ns
t20 SR
Data float after RD rising edge
(with RW-delay)
1 3
16.5 + tF
2 TCL - 8.5
+ tF + 2tA
1
ns
t21 SR
Data float after RD rising edge
(no RW-delay)
1 3
–4 + tF
TCL - 8.5
+ tF + 2tA
1
ns
t22 CC Data valid to WR
10 + tC
2 TCL - 15 + tC
–ns
t24 CC Data hold after WR
4 + tF
TCL - 8.5 + tF
–ns
t26 CC
ALE rising edge after RD, WR
-10 + tF
-10 + tF
–ns
t28 CC
Address/Unlatched CS hold
after RD, WR
2
0 (no tF)
-5 + tF
(tF > 0)
0 (no tF)
-5 + tF
(tF > 0)
–ns
t28h CC
Address/Unlatched CS hold
after WRH
-5 + tF
–-5 + tF
–ns
t38 CC
ALE falling edge to Latched CS
-4 - tA
6 - tA
-4 - tA
6 - tA
ns
t39 SR
Latched CS low to Valid Data In
18.5
+ tC + 2tA
3 TCL - 19
+ tC + 2tA
ns
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