AT89C5131A-RDTIL datasheet(139/186 Pages) ATMEL

Teilenummer	AT89C5131A-RDTIL

Bauteilbeschribung	8-bit Flash Microcontroller with Full Speed USB Device

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Hersteller	ATMEL [ATMEL Corporation]

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139

AT89C5131A-L

4338F–USB–08/07

Table 96. UEPNUM Register

UEPNUM (S:C7h)

USB Endpoint Number

Reset Value = 00h

EPNUM3

EPNUM2

EPNUM1

EPNUM0

Bit Number

Bit Mnemonic

Description

7-4

Reserved

The value read from these bits is always 0. Do not set these bits.

3-0

EPNUM[3:0]

Endpoint Number

Set this field with the number of the endpoint which will be accessed when

reading or writing to, UEPDATX Register UEPDATX (S:CFh) USB FIFO Data

Endpoint X (X = EPNUM set in UEPNUM Register UEPNUM (S:C7h) USB

Endpoint Number), UBYCTLX Register UBYCTLX (S:E2h) USB Byte Count

Low Register X (X = EPNUM set in UEPNUM Register UEPNUM (S:C7h)

USB Endpoint Number), UBYCTHX Register UBYCTHX (S:E3h) USB Byte

Count High Register X (X = EPNUM set in UEPNUM Register UEPNUM

(S:C7h) USB Endpoint Number) or UEPCONX Register UEPCONX (S:D4h)

USB Endpoint X Control Register. This value can be 0, 1, 2, 3, 4, 5 or 6.

AT89C5131A-RDTIL Datenblatt(PDF) 139 Page - ATMEL Corporation