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2.4

Endpoint Descriptor Block (EDB-1 to EDB-3)

TUSB3210

Universal Serial Bus

General-Purpose Device Controller

SLLS466F – FEBRUARY 2001 – REVISED AUGUST 2007

Data transfers between USB, MCU and external devices are defined by an endpoint descriptor block

(EDB). Four input and four output EDBs are provided. With the exception of EDB-0 (I/O endpoint 0), all

EDBs are located in SRAM as shown in Table 2-3. Each EDB contains information describing the X and Y

buffers. In addition, it provides general status information.

Table 2-3. EDB and Buffer Allocations in XDATA

ADDRESS

SIZE

DESCRIPTION

FF7F

↑

32 bytes

RESERVED

FF60

FF5F

↑

8 bytes

Input endpoint 3: configuration

FF58

FF57

↑

8 bytes

Input endpoint 2: configuration

FF50

FF4F

↑

8 bytes

Input endpoint 1: configuration

FF48

FF47

↑

40 bytes

RESERVED

FF20

FF1F

↑

8 bytes

Output endpoint 3: configuration

FF18

FF17

↑

8 bytes

Output endpoint 2: configuration

FF10

FF0F

↑

8 bytes

Output endpoint 1: configuration

FF08

FF07

↑

8 bytes

Setup packet block

FF00

FEFF

↑

8 bytes

Input endpoint 0: buffer

FEF8

FEF7

↑

8 bytes

Output endpoint 0: buffer

FEF0

FEEF

Top of buffer space

↑

368 bytes

Buffer space

FD80

Start of buffer space

Functional Description

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