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参数资料
型号： T9000
厂商： Lineage Power
英文描述： ISDN Network Termination Node (NTN) Device(ISDN网络终端节点器件)
中文描述： ISDN网络终端节点（新界西）设备（ISDN网网络终端节点器件）
文件页数： 26/126页
文件大小： 1523K
代理商： T9000
26
Lucent Technologies Inc.
Advance Data Sheet
April 2000
ISDN Network Termination Node (NTN) Device
T9000
6 Functional Modules
(continued)
6.15 External Program Memory Characteristics
Table 20. External Program Memory Characteristics
(Use with Figure 4 through Figure 6.)
Each timing symbol has five characters. The first character is always a T (time). The other characters, depending
on their positions, stand for the name of a signal or the logical status of that signal. The following list identifies each
character:
T
A
= 0
°
C to 70
°
C, V
CC
= 5 V
±
10%; V
SS
= 0 V; load capacitance for port 0, ALE, and PSEN = 100 pF; load capac-
itance for all other outputs = 80 pF.
Character
A
C
D
H
I
L
P
Meaning
Address
Clock
Input data
Logic level high
Character
Q
R
T
V
W
X
Z
Meaning
Output data
RD
signal
Time
Valid
WR
signal
Instruction (program memory contents)
Logic level low, or ALE
PSEN
No longer a valid logic level
Float
Symbol
1/TCLCL
TAVDV
TAVIV
TAVLL
TAVWL
TLHLL
TLLAX
TLLDV
TLLIV
TLLPL
TLLWL
TPLAZ
TPLIV
TPLPH
TPXAV
TPXIX
TPXIZ
TQVWH
TQVWX
TRHDX
TRHDZ
TRLAZ
TRLDV
TRLRH
TWHLH
TWHQX
TWLWH
Parameter
Min
—
—
—
Max
15.36
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Oscillator Frequency
Address Valid to Valid Data In
Address Valid to Valid Instruction In
Address Valid to ALE Low
Address to
RD
or
WR
Low
ALE Pulse Width
Address Hold After ALE Low
ALE Low to Valid Data In
ALE Low to Valid Instruction In
ALE Low to
PSEN
Low
ALE Low to
RD
or
WR
Low
PSEN
Low to Address Float
PSEN
Low to Valid Instruction In
PSEN
Pulse Width
PSEN
to Address Valid
Instruction Hold After
PSEN
Instruction Float After
PSEN
Data Valid to Write High
Data Valid to Write Transition
Data Hold After
RD
Data Float After
RD
RD
Low to Address Float
RD
Low to Valid Data In
RD
Pulse Low
RD
or WR High to ALE High
Data Hold After
WR
WR
Pulse Low
9TCLCL – 100
3TCLCL – 100
—
—
—
—
8TCLCL – 100
4TCLCL – 100
—
3TCLCL + 50
20
3TCLCL – 100
—
—
—
TCLCL – 20
—
—
—
2TCLCL – 50
20
5TCLCL – 100
—
TCLCL + 40
—
—
TCLCL – 40
4TCLCL – 40
2TCLCL – 40
TCLCL – 35
—
—
TCLCL – 25
3TCLCL – 50
—
—
3TCLCL – 40
TCLCL – 8
0
—
7TCLCL – 100
TCLCL – 50
0
—
—
—
6TCLCL – 50
TCLCL – 40
TCLCL – 50
6TCLCL – 50
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