ISP1181BBS,551 NXP Semiconductors, ISP1181BBS,551 Datasheet - Page 22

• Manufacturer Part Number: ISP1181BBS,551
• Manufacturer: NXP Semiconductors

Specifications of ISP1181BBS,551

• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / RoHS Status: Compliant

ISP1181B_3
Product data sheet
Fig 6.
SUSPEND
Suspend and resume timing.
GOSUSP
WAKEUP
USB bus
INT_N
11.1.1 Powered-off application
In
Figure 7
SUSPEND output switches off power to the microcontroller and other external circuits
during the suspend state. The ISP1181B is woken up through the USB bus (global
resume) or by the ring detection circuit on the telephone line.
•
•
•
•
Figure
A: indicates the point at which the USB bus enters the idle state.
B: indicates resume condition, which can be a 20 ms K-state on the USB bus, a HIGH
level on pin WAKEUP, or a LOW level on pin CS.
C: indicates remote wake-up. The ISP1181B will drive a K-state on the USB bus for
10 ms after pin WAKEUP goes HIGH or pin CS goes LOW.
D: after detecting the suspend interrupt, set and clear bit GOSUSP in the Mode
register.
A
shows a typical bus-powered modem application using the ISP1181B. The
6:
> 3 ms
suspend
interrupt
Rev. 03 — 23 January 2009
idle state
> 5 ms
1.8 ms to 2.2 ms
D
B
0.5 ms to 3.5 ms
interrupt
resume
C
Full-speed USB peripheral controller
10 ms
K-state
© ST-NXP Wireless 2009. All rights reserved.
ISP1181B
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