參數(shù)資料
型號: ISP1183
廠商: NXP Semiconductors N.V.
英文描述: Low-power Universal Serial Bus interface device with DMA
中文描述: 低功耗通用串行總線與DMA接口設(shè)備
文件頁數(shù): 54/62頁
文件大小: 295K
代理商: ISP1183
Philips Semiconductors
ISP1183
Low-power USB interface device with DMA
Product data
Rev. 01 — 24 February 2004
54 of 62
9397 750 11804
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
19.3 Self-powered mode
In the self-powered mode, pin VBUSDET_N cannot be used. The V
BUS
sensing can
be done in the following two ways:
Connecting V
BUS
to the MCU; see
Figure 25
.
When VBUSDET goes LOW, the MCU clears bit SOFTCT.
When VBUSDET goes HIGH, the MCU sets bit SOFTCT.
Connecting transistor switching; see
Figure 26
.
When V
BUS
is HIGH, V
REG(3V3)
will bypass to pull up DP. This indicates that the
device is connected.
When V
BUS
is LOW, pull up DP is switched off. This indicates that the device is
disconnected.
Remark:
The above implementation is necessary to comply with USB-IF
requirements.
Fig 24. Hybrid-powered mode.
004aaa452
MCU
ISP1183
VBUS
VREG(3V3)
VDD(I/O)
VBUSDET_N
VBUS
VDD(I/O)
8
12
18
30
VCC
self-powered
13
self-powered (1.65 V to 3.6 V)
相關(guān)PDF資料
PDF描述
ISP1183BS Low-power Universal Serial Bus interface device with DMA
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ISP1301BS Universal Serial Bus On-The-Go transceiver
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