AT89C5131-PLTIL ATMEL Corporation, AT89C5131-PLTIL Datasheet - Page 11
AT89C5131-PLTIL
Manufacturer Part Number
AT89C5131-PLTIL
Description
8-bit Flash Microcontroller with Full Speed USB Device
Manufacturer
ATMEL Corporation
Datasheet
1.AT89C5131-PLTIL.pdf
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4136B–USB–09/03
Table 12. Power Signal Description (Continued)
Signal
Name
VREF
Type
O
Description
USB pull-up Controlled Output
VREF is used to control the USB D+ 1.5 k
The Vref output is in high impedance when the bit DETACH is set in the
USBCON register.
When the bit DETACH is reseted,
In low-power chips, the Vref output voltage is equal to the AVDD input.
In standard versions, the Vref output voltage is equal to the internal
regulator output.
pull up.
AT89C5131
Alternate
Function
-
11
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