C8051F321 Silicon Laboratories Inc, C8051F321 Datasheet - Page 143

• Manufacturer Part Number: C8051F321
• Description: IC 8051 MCU 16K FLASH 28MLP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F32xr

Specifications of C8051F321

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 21
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 13x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

15.
C8051F320/1 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), 1k 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 Specifi-
cation 2.0 compliant.
† The C8051F320/1 cannot be used as a USB Host device.
D+
D-
UNIVERSAL SERIAL BUS CONTROLLER (USB0)
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.
VDD
Transceiver
Figure 15.1. USB0 Block Diagram
Transfer
Control
Data
Serial Interface Engine (SIE)
IN
Endpoint0
Endpoint1
IN/OUT
IN
Endpoint2
USB FIFOs
(1k RAM)
Rev. 1.1
IN
Endpoint3
OUT
OUT
OUT
Status, and
Registers
Interrupt
Control,
USB
C8051F320/1
CIP-51 Core
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