UPSD3422_V01 datasheet(176/300 Pages) STMICROELECTRONICS

tên linh kiện	UPSD3422

Giải thích chi tiết về linh kiện	Turbo Plus series Fast Turbo 8032 MCU with USB and programmable logic

PDF	300 Pages

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nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

Trang chủ	http://www.st.com

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176 / 300 page

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USB interface

UPSD3422, UPSD3433, UPSD3434, UPSD3454

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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 134)

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

command value register (see Table 136).

Table 134.

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

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

–

USCI[2:0]

Table 135.

USCI register bit definition

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

Table 136.

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

USCV[7:0]

Table 137.

USCV register bit definition

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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