AT89C5131A-S3SIL(2004) View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT89C5131A-S3SIL
(Rev.:2004)

8-bit Flash Microcontroller with Full Speed USB Device

Atmel Corporation 

AT89C5131A-L

Table 12. Power Signal Description (Continued)

Signal

Name Type Description

VREF

USB pull-up Controlled Output

O VREF is used to control the USB D+ 1.5 kΩ pull up.

The Vref output is in high impedance when the bit DETACH is set in the

USBCON register.

Alternate

Function

-

11

4338A–USB–08/04

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