C8051T323-GMR Silicon Labs, C8051T323-GMR Datasheet - Page 155
C8051T323-GMR
Manufacturer Part Number
C8051T323-GMR
Description
8-bit Microcontrollers - MCU USB-OTP-16K-QFN28
Manufacturer
Silicon Labs
Datasheet
1.C8051T322-GQR.pdf
(292 pages)
Specifications of C8051T323-GMR
Rohs
yes
Core
8051
Data Bus Width
8 bit
Processor Series
C8051
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23. Universal Serial Bus Controller (USB0)
C8051T620/621/320/321/322/323 devices include a complete Full/Low Speed USB function for USB
peripheral implementations. The USB Function Controller (USB0) consists of a Serial Interface Engine
(SIE), USB Transceiver (including matching resistors and configurable pull-up resistors), 1 kB FIFO block,
and clock recovery mechanism for crystal-less operation. No external components are required. The USB
Function Controller and Transceiver is Universal Serial Bus Specification 2.0 compliant.
Important Note: This document assumes a comprehensive understanding of the USB Protocol. Terms and
abbreviations used in this document are defined in the USB Specification. We encourage you to review the
latest version of the USB Specification before proceeding.
Note: The C8051T620/621/320/321/322/323 cannot be used as a USB Host device.
23.1. Endpoint Addressing
A total of eight endpoint pipes are available. The control endpoint (Endpoint0) always functions as a bi-
directional IN/OUT endpoint. The other endpoints are implemented as three pairs of IN/OUT endpoint
pipes:
D+
D-
VDD
Transceiver
Figure 23.1. USB0 Block Diagram
Transfer
Control
C8051T620/621/320/321/322/323
Data
Serial Interface Engine (SIE)
IN
Endpoint0
Endpoint1
Rev. 1.1
IN/OUT
IN
Endpoint2
USB FIFOs
(1k RAM)
IN
Endpoint3
OUT
OUT
OUT
Status, and
Registers
Interrupt
Control,
USB
CIP-51 Core
155
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