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(Note) Detection of USB storage media
The chassis part of USB storage media => USB GND
When USB storage media is inserted to “USB MEMORY” port,
“GND” of HCD-AZ7DM => pin 4 of USB
=> USB storage media chassis
=> USB_A_DET terminal of System controller (IC401 18pin),
=> USB_A_DET terminal of System controller (IC401 18pin),
When System controller detects the USB storage media insertion,
“USB CONNECT” is shown on the display.
“USB CONNECT” is shown on the display.
Chassis part of
USB storage media
For most of USB storage media, the chassis part which is inserted to USB
terminal is connected to USB GND pin (4pin).
HCD-AZ7DM detects the insertion of USB storage media by this characteristic.
When USB storage media is inserted to “USB MEMORY” port, USB GND pin
(pin 4) is connected to GND of HCD-AZ7DM. Then, the chassis of USB storage
media is also connected to GND.
media is also connected to GND.
System controller detects the insertion of USB storage media with USB_A_DET
terminal of System controller (IC401 18pin).
(L: USB media is connected, Open: No connect)
When System controller detects the USB storage media insertion, “USB
CONNECT” is shown on the display.
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