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34825 데이터시트(PDF) 23 Page - Freescale Semiconductor, Inc

부품명 34825
상세설명  Micro-USB Interface IC
PDF  39 Pages
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제조업체  FREESCALE [Freescale Semiconductor, Inc]
홈페이지  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

34825 데이터시트(HTML) 23 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
Freescale Semiconductor
23
34825
FUNCTIONAL DEVICE OPERATION
OPERATION AFTER IDENTIFICATION
Figure 16. Audio Accessory with Remote Control and Microphone
Figure 17. The Remote Control Key Pressing Timing
TEST ACCESSORY
The Test Accessories listed in Table 21 are special USB
cables and UART cables for test and R/D purpose. It has an
ID resistance to differentiate it from a regular USB cable or
UART cable. The test accessory has four ID resistance
values to distinguish the test cable type. The detection result
turns on or off the USB switches, UART switches, and the
power MOSFET automatically, as shown in the Table 8.
MIC
VBUS
…...
R1
R2
R3
RN-1
RN
HOLD
Audio_R
Audio_L
D+
D-
ID
GND
AUDIO
ACCESSORY
SEND/END
/
20 ms
Key Press
20 ms
TKP
TLKP
KP
INT
LKP
LKR
INT
ADC Time
Interrupt Register read
Interrupt Register read
Interrupt Register read
20 ms
Table 8. Switch Status vs. Test Cables
Accessory Type
ADC Result
Auto-ON Switches
Power MOSFET
UART test cable type 1
01110
UART Switches
OFF
UART test cable type 2
01111
UART Switches
OFF
USB test cable type 1
10000
USB Switches
ON
USB test cable type 2
10001
USB Switches
ON
Other accessories
others
No auto-on Switches
No auto-on Switches



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