參數(shù)資料
型號(hào): 935268625518
廠商: NXP SEMICONDUCTORS
元件分類: 總線控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP64
封裝: 10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-314-2, LQFP-64
文件頁(yè)數(shù): 48/82頁(yè)
文件大?。?/td> 1965K
代理商: 935268625518
Philips Semiconductors
ISP1581
Hi-Speed USB interface device
Product data
Rev. 05 — 26 February 2003
52 of 78
9397 750 10766
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
14.1 Timing symbols
Table 74:
Legend for timing characteristics
Symbol
Description
Time symbols
t
time
T
cycle time (periodic signal)
Signal names
A
address;
DMA acknowledge (DACK)
C
clock;
command
D
data input;
data
E
chip enable
G
output enable
I
instruction (program memory content);
input (general)
L
address latch enable (ALE)
P
program store enable (PSEN, active LOW);
propagation delay
Q
data output
R
read signal (RD, active LOW);
read (action);
DMA request (DREQ)
S
chip select
W
write signal (WR, active LOW);
write (action);
pulse width
U
undened
Y
output (general)
Logic levels
H
logic HIGH
L
logic LOW
P
stop, not active (OFF)
S
start, active (ON)
V
valid logic level
X
invalid logic level
Z
high-impedance (oating, three-state)
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