參數(shù)資料
型號: DS80C320MCG
英文描述: (434.89 k)
中文描述: (434.89十一)
文件頁數(shù): 20/38頁
文件大?。?/td> 434K
代理商: DS80C320MCG
DS80C320/DS80C323
110196 20/38
AC ELECTRICAL CHARACTERISTICS
(0
°
C to 70
°
C; V
CC
=4.0V to 5.5V)
VARIABLE
CLOCK
MIN
MAX
PARAMETER
SYMBOL
25 MHz
MIN
25 MHz
MAX
VARIABLE
CLOCK
UNITS
Oscillator Frequency
1/t
CLCL
0
25
0
25
MHz
ALE Pulse Width
t
LHLL
50
1.5t
CLCL
–10
ns
Port 0 Address Valid to ALE Low
t
AVLL
9
0.5t
CLCL
–11
ns
Address Hold After ALE Low
t
LLAX1
5
note 5
0.25t
CLCL
–5
note 5
ns
Address Hold After ALE Low for
MOVX WR
t
LLAX2
13
0.5t
CLCL
–7
ns
ALE Low to Valid Instruction In
t
LLIV
73
2.5t
CLCL
–27
ns
ALE Low to PSEN Low
t
LLPL
3
0.25t
CLCL
–7
ns
PSEN Pulse Width
t
PLPH
83
2.25t
CLCL
–7
ns
PSEN Low to Valid Instr. In
t
PLIV
69
2.25t
CLCL
–21
ns
Input Instruction Hold After PSEN
t
PXIX
0
0
ns
Input Instruction Float After PSEN
t
PXIZ
35
t
CLCL
–5
ns
Port 0 Address to Valid Instr. In
t
AVIV1
93
3t
CLCL
–27
ns
Port 2 Address to Valid Instr. In
t
AVIV2
107
3.5t
CLCL
–33
ns
PSEN Low to Address Float
t
PLAZ
note 5
note 5
ns
NOTES FOR AC ELECTRICAL CHARACTERISTICS:
All parameters apply to both commercial and industrial temperature range operation unless otherwise noted.
1. All signals rated over operating temperature at 25 MHz.
2. All signals characterized with load capacitance of 80 pF except Port 0, ALE, PSEN, RD and WR at 100 pF.
Note that loading should be approximately equal for valid timing.
3. Interfacing to memory devices with float times (turn off times) over 35 ns may cause contention. This will not
damage the parts, but will cause an increase in operating current.
4. Specifications assume a 50% duty cycle for the oscillator. Port 2 timing will change with the duty cycle varia-
tions.
5. Address is held in a weak latch until over driven by external memory.
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