參數(shù)資料
型號: ST10R272LT6
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 16-BIT, 50 MHz, MICROCONTROLLER, PQFP100
封裝: 14 X 14 MM, TQFP-100
文件頁數(shù): 55/77頁
文件大?。?/td> 707K
代理商: ST10R272LT6
59/77
ST10R272L - ELECTRICAL CHARACTERISTICS
16.3.4
Demultiplexed Bus
VDD = 3.3 V ± 0.3 V
VSS = 0 V
TA = -40 to +85 °C
CL = 50 pF
ALE cycle time = 4 TCL + 2
tA + tC + tF (40 ns at 50 MHz CPU clock without waitstates)
Parameter
Symbol
Max CPU Clock 50MHz
Variable CPU Clock
1/2TCL = 1 to 50 MHz
Un
it
min.
max.
min.
max.
ALE high time
t5
CC
7 +
tA
TCL - 3 +
tA
–ns
Address (P1, P4), BHE
setup to ALE
t6
CC
3 +
tA
TCL - 7 +
tA
–ns
Address setup to RD, WR
(with RW-delay)
t80
CC
13 +
2tA
2TCL - 7 +
2tA –ns
Address setup to RD, WR
(no RW-delay)
t81
CC
3 +
2tA
TCL - 7 +
2tA –ns
RD, WR low time
(with RW-delay)
t12
CC
13 +
tC
2TCL - 7 +
tC –ns
RD, WR low time
(no RW-delay)
t13
CC
23 +
tC
3TCL - 7 +
tC –ns
RD to valid data in
(with RW-delay)
t14
SR
5 +
tC
2TCL - 15
+
tC
ns
RD to valid data in
(no RW-delay)
t15
SR
15 +
tC
3TCL - 15
+
tC
ns
ALE low to valid data in
t16
SR
15 +
tA + tC
3TCL - 15
+
tA + tC
ns
Address to valid data in
t17
SR
20 + 2
tA +
tC
4TCL - 20
+ 2
tA + tC
ns
Data hold after RD
rising edge
t18
SR
0
0
ns
Data float after RD rising
edge (with RW-delay)1) 2)
t20
SR
15
+
tF + 2tA
2
–2TCL - 5
+
tF + 2tA
2
ns
Data float after RD rising
edge (no RW-delay)1 2
t21
SR
5 +
tF +
2
tA
2
–TCL - 5
+
tF + 2tA
2
ns
Data valid to WR
t22
CC
13 +
tC
2TCL - 7 +
tC –ns
Table 18 Demultiplexed bus
1
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