C8051T622-GMR Silicon Labs, C8051T622-GMR Datasheet - Page 116

• Manufacturer Part Number: C8051T622-GMR
• Description: 8-bit Microcontrollers - MCU USB-OTP-16K-QFN24
• Manufacturer: Silicon Labs

Specifications of C8051T622-GMR

• Rohs: yes
• Core: 8051
• Data Bus Width: 8 bit
• Processor Series: C8051

C8051T622/3 and C8051T326/7
18. Universal Serial Bus Controller (USB0)
C8051T622/3 and C8051T326/7 devices include a complete Full/Low Speed USB function for USB periph-
eral implementations. The USB Function Controller (USB0) consists of a Serial Interface Engine (SIE),
USB Transceiver (including matching resistors and configurable pull-up resistors), 256-Byte 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 C8051T622/3 and C8051T326/7 cannot be used as a USB Host device.
18.1. Endpoint Addressing
A total of six endpoint pipes are available. The control endpoint (Endpoint0) always functions as a bi-direc-
tional IN/OUT endpoint. The other endpoints are implemented as two pairs of IN/OUT endpoint pipes:
116
D+
D-
VDD
Transceiver
Figure 18.1. USB0 Block Diagram
Transfer
Control
Data
Serial Interface Engine (SIE)
IN
Endpoint0
Endpoint1
(256 bytes RAM)
Rev. 1.1
IN/OUT
USB FIFOs
IN
Endpoint2
OUT
OUT
Status, and
Registers
Interrupt
Control,
USB
CIP-51 Core