參數(shù)資料
型號: UPSD3254B-40U6T
廠商: 意法半導體
英文描述: Flash Programmable System Devices with 8032 Microcontroller Core and 256Kbit SRAM
中文描述: 閃存可編程系統(tǒng)設備與8032微控制器核心和256Kbit的SRAM
文件頁數(shù): 147/176頁
文件大?。?/td> 1214K
代理商: UPSD3254B-40U6T
147/176
μPSD325X DEVICES
Table 111. AC Symbols for Timing
Example: t
AVLX
Time from Address Valid to ALE
Invalid.
Figure 74. Switching Waveforms – Key
Signal Letters
Signal Behavior
A
Address
t
Time
C
Clock
L
Logic Level Low or ALE
D
Input Data
H
Logic Level High
I
Instruction
V
Valid
L
ALE
X
No Longer a Valid Logic Level
N
RESET Input or Output
Z
Float
P
PSEN signal
PW
Pulse Width
Q
Output Data
R
RD signal
W
WR signal
B
V
STBY
Output
M
Output Macrocell
WAVEFORMS
INPUTS
OUTPUTS
STEADY INPUT
MAY CHANGE FROM
HI TO LO
MAY CHANGE FROM
LO TO HI
DON'T CARE
OUTPUTS ONLY
STEADY OUTPUT
WILL BE CHANGING
FROM HI TO LO
WILL BE CHANGING
LO TO HI
CHANGING, STATE
UNKNOWN
CENTER LINE IS
TRI-STATE
AI03102
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