參數(shù)資料
型號: ISP1183BS,157
廠商: ST-ERICSSON
元件分類: 總線控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQCC32
封裝: 5 X 5 MM, 0.85 MM HEIGHT, PLASTIC, MO-220, SOT-617-1, HVQFN-32
文件頁數(shù): 15/65頁
文件大?。?/td> 306K
代理商: ISP1183BS,157
ISP1183_2
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 02 — 7 June 2007
22 of 65
NXP Semiconductors
ISP1183
Low-power USB Peripheral Controller with DMA
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.
11.1.1 Powered-off application
Figure 12 shows a typical bus-powered modem application using the ISP1183. The
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 11. 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
Fig 12. SUSPEND and WAKEUP signals in a powered-off modem application
WAKEUP
8031
RST
RING DETECTION
ISP1183
DP
DM
USB
VBUS
VCC
LINE
004aaa293
SUSPEND
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