TallyGenicom 2440 User Guide

B-8

Endpoint 1 Descriptor

Endpoint 2 Descriptor

6

bInterfaceSubClass

Byte

0x01

Subclass code (Printer sub-
class).

7

bInterfacePotocol

Byte

0x01

Receive.

8

iInterface

Byte

0x00

Index of string descriptor 
describing this interface.

0

bLength

Byte

0x07

Size of this descriptor in bytes.

1

bDescriptorType

Byte

0x05

Interface descriptor type.

2

bEndPointAddress

Byte

0x01

This is an Out endpoint, End-
point 1.

3

bmAttributes

Byte

0x02

This is a Bulk endpoint.

4

wMaxPacketSize

Word

0x0040

Maximum data transfer size.

6

bInterval

Byte

0x00

(This field is ignored for bulk.)

0

bLength

Byte

0x07

Size of this descriptor in bytes.

1

bDescriptorType

Byte

0x05

Interface descriptor type.

2

bEndPointAddress

Byte

0x82

This is an In endpoint, End-
point 2.

3

bmAttributes

Byte

0x02

This is a Bulk endpoint.

4

wMaxPacketSize

Word

0x0040

Maximum data transfer size.

6

bInterval

Byte

0x00

(This field is ignored for bulk.)