ISP1183BS STEricsson, ISP1183BS Datasheet - Page 23

• Manufacturer Part Number: ISP1183BS
• Manufacturer: STEricsson

Specifications of ISP1183BS

• Lead Free Status / RoHS Status: Supplier Unconfirmed

ISP1183_3
Product data sheet
Fig 11. Suspend and resume timing
SUSPEND
GOSUSP
WAKEUP
USB bus
INT_N
11.1.1 Powered-off application
In
Figure 12
SUSPEND output switches off power to the microcontroller and other external circuits
during the suspend state. The ISP1183 is woken up through the USB bus (global resume)
or by the ring detection circuit on the telephone line.
Fig 12. SUSPEND and WAKEUP signals in a powered-off modem application
•
•
•
•
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_N.
C: indicates remote wake-up. The ISP1183 will drive a K-state on the USB bus for
10 ms after pin WAKEUP goes HIGH or pin CS_N goes LOW.
D: after detecting the suspend interrupt, set and clear bit GOSUSP in the Mode
register.
A
11:
shows a typical bus-powered modem application using the ISP1183. The
> 3 ms
suspend
interrupt
USB
V
BUS
Rev. 03 — 20 January 2009
idle state
> 5 ms
1.8 ms to 2.2 ms
DP
DM
D
ISP1183
V
SUSPEND
BUS
WAKEUP
B
0.5 ms to 3.5 ms
Low-power USB Peripheral Controller with DMA
interrupt
resume
C
RING DETECTION
V
RST
CC
8031
K-state
10 ms
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