at85c51snd3b ATMEL Corporation, at85c51snd3b Datasheet - Page 93

• Manufacturer Part Number: at85c51snd3b
• Description: Single-chip Digital Audio Decoder - Encoder With Usb 2.0 Interface
• Manufacturer: ATMEL Corporation

7632C–MP3–11/06
The control logic of the UVCC pad outputs 2 signals:
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In the Host mode, the VBUS flag follows the next hysteresis rule:
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In the Peripheral mode, the VBUS flag follows the next rule:
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The VBUSTI interrupt is triggered at each transition of the VBUS flag.
The “session_valid” signal is active high when the voltage on the UVCC pin is higher
or equal to 1.4V.
The “Va_Vbus_valid” signal is active high when the voltage on the UVCC pin is
higher or equal to 4.4V.
VBUS is set when the voltage on the UVCC pin is higher or equal to 4.4 V.
VBUS is cleared when the voltage on the UVCC pin is lower than 1.4 V.
VBUS is set when the voltage on the UVCC pin is higher or equal to 1.4 V.
VBUS is cleared when the voltage on the UVCC pin is lower than 1.4 V.
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