參數(shù)資料
型號(hào): NSC800E
廠商: National Semiconductor Corporation
英文描述: NSC800TM High-Performance Low-Power CMOS Microprocessor
中文描述: NSC800TM高性能低功耗CMOS微處理器
文件頁(yè)數(shù): 4/76頁(yè)
文件大?。?/td> 785K
代理商: NSC800E
4.0 AC Electrical Characteristics
V
CC
e
5V
g
10%, GND
e
0V, unless otherwise specified
Symbol
Parameter
NSC800-1
NSC800-3
NSC800-35
NSC800-4
Units
Notes
Min
Max
Min
Max
Min
Max
Min
Max
t
X
Period at XIN and XOUT
Pins
500
3333
200
3333
142
3333
125
3333
ns
T
Period at Clock Output
(
e
2 t
X
)
1000
6667
400
6667
284
6667
250
6667
ns
t
R
Clock Rise Time
110
110
90
80
ns
Measured from
10%–90% of signal
t
F
Clock Fall Time
70
60
55
50
ns
Measured from
10%–90% of signal
t
L
Clock Low Time
435
150
90
80
ns
50% duty cycle, square
wave input on XIN
t
H
Clock High Time
450
145
85
75
ns
50% duty cycle, square
wave input on XIN
t
ACC(OP)
ALE to Valid Data
1340
490
340
300
ns
Add t for each WAIT STATE
t
ACC(MR)
ALE to Valid Data
1875
620
405
360
ns
Add t for each WAIT STATE
t
AFR
AD(0–7) Float after
RD Falling
0
0
0
0
ns
t
BABE
BACK Rising to Bus
Enable
1000
400
300
250
ns
t
BABF
BACK Falling to
Bus Float
50
50
50
50
ns
t
BACL
BACK Fall to CLK
Falling
425
125
60
55
ns
t
BRH
BREQ Hold Time
0
0
0
0
ns
t
BRS
BREQ Set-Up Time
100
50
50
45
ns
t
CAF
Clock Falling ALE
Falling
0
70
0
65
0
60
0
55
ns
t
CAR
Clock Rising to ALE
Rising
0
100
0
100
0
90
0
80
ns
t
CRD
Clock Rising to
Read Rising
100
90
90
80
ns
t
CRF
Clock Rising to
Refresh Falling
80
70
70
65
ns
t
DAI
ALE Falling to INTA
Falling
445
160
95
85
ns
t
DAR
ALE Falling to
RD Falling
400
575
160
250
100
180
90
160
ns
t
DAW
ALE Falling to
WR Falling
900
1010
350
420
225
300
200
265
ns
t
D(BACK)1
ALE Falling to BACK
Falling
2460
975
635
560
ns
Add t for each WAIT state
Add t for opcode fetch cycles
t
D(BACK)2
BREQ Rising to BACK
Rising
500
1610
200
700
140
540
125
475
ns
t
D(I)
ALE Falling to INTR,
NMI, RSTA-C, PS,
BREQ, Inputs Valid
1360
475
284
250
ns
Add t for each WAIT state
Add t for opcode fetch cycles
t
DPA
Rising PS to
Falling ALE
500
1685
200
760
140
580
125
510
ns
SeeFigure 14 also
t
D(WAIT)
ALE Falling to
WAIT Input Valid
550
250
170
125
ns
OPD Opcode Fetch
MRD Memory Read
4
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