參數(shù)資料
型號: ISP1301
廠商: NXP Semiconductors N.V.
英文描述: Universal Serial Bus On-The-Go transceiver
中文描述: 通用串行總線在- The - Go的收發(fā)器
文件頁數(shù): 8/46頁
文件大?。?/td> 245K
代理商: ISP1301
Philips Semiconductors
ISP1301
USB OTG transceiver
Product data
Rev. 01 — 14 April 2004
8 of 46
9397 750 11355
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
8.4 ID detector
In either the active or suspended power mode, the ID detector senses the condition of
the ID line and differentiates between the following three conditions:
Pin ID is floating; bit ID_FLOAT = 1
Pin ID is shorted to ground; bit ID_GND = 1
Pin ID is connected to ground through resistor R
ACC_ID
; bit ID_FLOAT = 0 and bit
ID_GND = 0.
The ID detector also has a switch that can be used to ground pin ID. This switch is
controlled by bit ID_PULLDOWN in the serial controller.
8.5 Pull-up and pull-down resistors
The pull-up and pull-down resistors include the following switchable resistors:
Pin DP pull-up
Pin DP pull-down
Pin DM pull-up
Pin DM pull-down.
The pull-up resistor is a context variable as described in the ECN_27%_Resistor
document. The variable pull-up resistor hardware is implemented to meet the USB
ECN_27% specification.
8.6 USB transceiver (ATX)
The behavior of the USB transceiver depends on the operation mode of the ISP1301:
In the USB mode, the USB transceiver block performs USB full-speed or
low-speed transceiver functions. This includes differential driver, differential
receiver and single-ended receivers.
In the transparent general purpose buffer mode or the UART mode, the USB
transceiver block functions as a level shifter between the pins DAT/VP and SE0/VM
and the pins DP and DM.
8.7 3.3 V DC-DC regulator
The built-in 3.3 V DC-DC regulator conditions the supply voltage (V
BAT
) for use in the
ISP1301:
V
BAT
= 3.6 V to 4.5 V: the regulator will output 3.3 V
±
10 %
V
BAT
< 3.6 V: the regulator will be bypassed.
The output of the regulator can be monitored on the V
REG(3V3)
pin.
8.8 Car kit interrupt detector
The car kit interrupt detector is a comparator that detects when the DP line is below
the car kit interrupt threshold V
PH_CR_INT
(0.4 V to 0.6 V). The car kit interrupt
detector is enabled in the audio mode only (bit AUDIO_EN = 1).
相關(guān)PDF資料
PDF描述
ISP1301BS Universal Serial Bus On-The-Go transceiver
ISP1362 Single-chip Universal Serial Bus On-The-Go controller
ISP1362BD Single-chip Universal Serial Bus On-The-Go controller
ISP1362EE Single-chip Universal Serial Bus On-The-Go controller
ISP1501 Hi-Speed Universal Serial Bus peripheral transceiver
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