isp1181 NXP Semiconductors, isp1181 Datasheet - Page 52

• Manufacturer Part Number: isp1181
• Description: Isp1181 Full-speed Universal Serial Bus Interface Device
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 08938
Product data
19.1 Timing symbols
Table 57:
Symbol
Time symbols
t
T
Signal names
A
C
D
E
G
I
L
P
Q
R
S
W
U
Y
Logic levels
H
L
P
S
V
X
Z
Legend for timing characteristics
Description
time
cycle time (periodic signal)
address;
DMA acknowledge (DACK)
clock;
command
data input;
data
chip enable
output enable
instruction (program memory content);
input (general)
address latch enable (ALE)
program store enable (PSEN, active LOW);
propagation delay
data output
read signal (RD, active LOW);
read (action);
DMA request (DREQ)
chip select
write signal (WR, active LOW);
write (action);
pulse width
undefined
output (general)
logic HIGH
logic LOW
stop, not active (OFF)
start, active (ON)
valid logic level
invalid logic level
high-impedance (floating, three-state)
Rev. 04 — 30 October 2001
© Koninklijke Philips Electronics N.V. 2001. All rights reserved.
Full-speed USB interface
ISP1181
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