C8051F321 Silicon Laboratories Inc, C8051F321 Datasheet - Page 56
![IC 8051 MCU 16K FLASH 28MLP](/photos/6/93/69391/sl-28-mlp_sml.jpg)
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
56
INTERNAL REFERENCE (REFBE = 1)
Output Voltage
VREF Short-Circuit Current
VREF Temperature Coefficient
Load Regulation
VREF Turn-on Time 1
VREF Turn-on Time 2
VREF Turn-on Time 3
Power Supply Rejection
EXTERNAL REFERENCE (REFBE = 0)
Input Voltage Range
Input Current
BIAS GENERATORS
ADC Bias Generator
Reference Bias Generator
Bits7-3:
Bit3:
Bit2:
Bit1:
Bit0:
R/W
Bit7
-
PARAMETER
UNUSED. Read = 00000b; Write = don’t care.
REFSL: Voltage Reference Select.
This bit selects the source for the internal voltage reference.
0: VREF pin used as voltage reference.
1: VDD used as voltage reference.
TEMPE: Temperature Sensor Enable Bit.
0: Internal Temperature Sensor off.
1: Internal Temperature Sensor on.
BIASE: Internal Analog Bias Generator Enable Bit.
0: Internal Bias Generator off.
1: Internal Bias Generator on.
REFBE: Internal Reference Buffer Enable Bit.
0: Internal Reference Buffer disabled.
1: Internal Reference Buffer enabled. Internal voltage reference driven on the VREF pin.
R/W
Bit6
-
VDD = 3.0 V; -40°C TO +85°C UNLESS OTHERWISE SPECIFIED
Table 6.1. Voltage Reference Electrical Characteristics
Figure 6.2. REF0CN: Reference Control Register
R/W
Bit5
-
25°C ambient
Load = 0 to 200 µA to GND
4.7µF tantalum, 0.1µF ceramic bypass
0.1µF ceramic bypass
no bypass cap
Sample Rate = 200 ksps; VREF = 3.0 V
BIASE = ‘1’
R/W
Bit4
-
CONDITIONS
Rev. 1.1
REFSL
R/W
Bit3
TEMPE
R/W
Bit2
MIN
2.38
BIASE
0
R/W
Bit1
TYP
2.44
140
100
1.5
15
20
10
12
40
2
REFBE
R/W
Bit0
MAX
VDD
2.50
10
SFR Address:
00000000
Reset Value
0xD1
ppm/µA
UNITS
ppm/°C
ppm/V
mA
µA
µA
µA
ms
µs
µs
V
V
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