參數(shù)資料
型號(hào): ISP1181BBS
廠商: NXP SEMICONDUCTORS
元件分類: 總線控制器
英文描述: Full-speed Universal Serial Bus peripheral controller
中文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQCC48
封裝: 7 X 7 MM, 0.85 MM HEIGHT, PLASTIC, MO-220, SOT-619-2, HVQFN-48
文件頁(yè)數(shù): 21/70頁(yè)
文件大?。?/td> 341K
代理商: ISP1181BBS
Philips Semiconductors
ISP1181B
Full-speed USB peripheral controller
Product data
Rev. 02 — 07 December 2004
21 of 70
9397 750 13958
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
In
Figure 6
:
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.
11.1.1
Powered-off application
Figure 7
shows a typical bus-powered modem application using the ISP1181B. The
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.
Fig 6.
Suspend and resume timing.
004aaa359
INT_N
> 5 ms
suspend
interrupt
USB BUS
GOSUSP
WAKEUP
SUSPEND
idle state
10 ms
K-state
> 3 ms
1.8 ms to 2.2 ms
0.5 ms to 3.5 ms
resume
interrupt
A
C
D
B
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