C8051F321 Silicon Laboratories Inc, C8051F321 Datasheet - Page 67
C8051F321
Manufacturer Part Number
C8051F321
Description
IC 8051 MCU 16K FLASH 28MLP
Manufacturer
Silicon Laboratories Inc
Series
C8051F32xr
Datasheet
1.C8051F320R.pdf
(256 pages)
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
-
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C8051F320/1
8.
VOLTAGE REGULATOR (REG0)
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 using bit
REGEN in register REG0CN. See Table 8.1 for REG0 electrical characteristics.
Note that the VBUS signal must be connected to the VBUS pin when using the device in a USB network. The VBUS
signal should only be connected to the REGIN pin when operating the device as a bus-powered function. REG0 con-
figuration options are shown in Figure 8.1 - Figure 8.4.
Rev. 1.1
67
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