N80C251SQ16 데이터 시트보기 (PDF) - Intel
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N80C251SQ16 Datasheet PDF : 36 Pages
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8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
Table 11. AC Characteristics (Continued)
Symbol
Parameter
@ Max Fosc (1)
Min Max
Fosc Variable
Min
Max
Units
TRLRH (2) RD# or PSEN# Pulse Width
@ 12 MHz
@ 16 MHz
ns
146.6
105
2(1+N)
TOSC – 20
(4)
TWLWH
WR# Pulse Width
@ 12 MHz
@ 16 MHz
ns
146.6
105
2(1+N)
TOSC – 20
(4)
TLLRL (2) ALE Low to RD# or PSEN# Low
ns
@ 12 MHz
58.3
@ 16 MHz
37.5
TOSC – 25
TLHAX
ALE High to Address Hold
@ 12 MHz
@ 16 MHz
ns
83.3
62.5
(1+2M)TOSC
(3)
TRLDV (2) RD#/PSEN# Low to valid Data/Instruction In
@ 12 MHz
@ 16 MHz
106.6
65
ns
2(1+N) (4)
Tosc – 60
TRHDX (2)
TRLAZ (2)
Data/Instruction Hold Time. Occurs after
RD#/PSEN# are exerted to VOH
RD#/PSEN# Low to Address Float
0
Typ.=0 2
(5)
0
ns
Typ. = 0
2
ns
(5)
TRHDZ1 Instruction Float after RD#/PSEN# High
ns
commercial @ 12 MHz and 16 MHz Typ.=2 18
Typ.=25
18
express @ 12 MHz and 16 MHz
5 10
Typ.=25
10
Typ.=2
(5)
5
(5)
TRHDZ2
Data Float after RD#/PSEN# High
@ 12 MHz
@ 16 MHz
156.6
115
ns
2Tosc – 10
TRHLH1 RD#/PSEN# High to ALE High (Instruction)
ns
@ 12 MHz
10
@ 16 MHz
10
10
TRHLH2 RD#/PSEN# High to ALE High (Data)
ns
@ 12 MHz
@ 16 MHz
156.6
115
2Tosc - 10
TWHLH
WR# High to ALE High
@ 12 MHz
@ 16 MHz
ns
171.6
130
2Tosc + 5
NOTES:
1. 16 MHz.
2. Specifications for PSEN# are identical to those for RD#.
3. In the formula, M=Number of wait states (0 or 1) for ALE.
4. In the formula, N=Number of wait states (0,1,2, or 3) for RD#/PSEN#/WR#.
5. “Typical” specifications are untested and not guaranteed.
20
PRELIMINARY
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