C8051F320 Silicon Laboratories Inc, C8051F320 Datasheet - Page 23

• Manufacturer Part Number: C8051F320
• Description: IC 8051 MCU 16K FLASH 32LQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F32xr

Specifications of C8051F320

• 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: 25
• 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 17x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

1.3.
The Universal Serial Bus Controller (USB0) is a USB 2.0 compliant Full or Low Speed function with integrated
transceiver and endpoint FIFO RAM. A total of eight endpoint pipes are available: a bi-directional control endpoint
(Endpoint0) and three pairs of IN/OUT endpoints (Endpoints1-3 IN/OUT).
A 1k block of XRAM is used as dedicated USB FIFO space. This FIFO space is distributed among Endpoints0-3;
Endpoint1-3 FIFO slots can be configured as IN, OUT, or both IN and OUT (split mode). The maximum FIFO size is
512 bytes (Endpoint3).
USB0 can be operated as a Full or Low Speed function. On-chip 4x Clock Multiplier and clock recovery circuitry
allow both Full and Low Speed options to be implemented with the on-chip precision oscillator as the USB clock
source. An external oscillator source can also be used with the 4x Clock Multiplier to generate the USB clock. The
CPU clock source is independent of the USB clock.
The USB Transceiver is USB 2.0 compliant, and includes on-chip matching and pull-up resistors. The pull-up resis-
tors can be enabled/disabled in software, and will appear on the D+ or D- pin according to the software-selected
speed setting (Full or Low Speed).
1.4.
C8051F320/1 devices include a 5 V-to-3 V voltage regulator (REG0). When enabled, the REG0 output appears on
the VDD pin and can be used to power external devices. REG0 can be enabled/disabled by software.
D+
D-
Universal Serial Bus Controller
Voltage Regulator
VDD
Transceiver
Figure 1.6. USB Controller Block Diagram
Transfer
Control
Data
Serial Interface Engine (SIE)
IN
Endpoint0
Endpoint1
IN/OUT
IN
USB FIFOs
Endpoint2
(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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