UPSD3422 datasheet(169/293 Pages) STMICROELECTRONICS

부품명	UPSD3422

상세설명	Turbo Plus Series Fast Turbo 8032 MCU with USB and Programmable Logic

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169 / 293 page

uPSD34xx

USB interface

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USB Setup Command Index and Value Registers (USCI and USCV)

When a Setup/Data packet is received over the USB, the 8 bytes of data received are

stored in a command buffer. The USB Setup Command Index Register (see Table 87)

determines which one of the eight bytes in the buffer is read using the USB Setup

Command Value Register (see Table 88).

Table 87.

USB setup command index register (USCI 0F5h, reset value 00h)

Table 88.

USB setup command value register (USCV 0F6h, reset value 00h)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

–

USCI[2:0]

Bit

Symbol

R/W

Definition

7:3

–

Reserved

2:0

USCI[2:0]

R/W

Index to access one of the 8 bytes of USB Setup Command

Data received with the last Setup transaction

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

USCV[7:0]

Bit

Symbol

R/W

Definition

7:0

USCV

R/W

The nth byte of the 8 bytes of USB Setup Command Data

received with the last Setup transaction. The nth byte that is

read from this register is specified by the index value in the

USCI register.

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