IC 8051 MCU 64K FLASH 64TQFP

C8051F021-GQ

Manufacturer Part NumberC8051F021-GQ
DescriptionIC 8051 MCU 64K FLASH 64TQFP
ManufacturerSilicon Laboratories Inc
SeriesC8051F02x
C8051F021-GQ datasheets
 


Specifications of C8051F021-GQ

Program Memory TypeFLASHProgram Memory Size64KB (64K x 8)
Package / Case64-TQFP, 64-VQFPCore Processor8051
Core Size8-BitSpeed25MHz
ConnectivityEBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USARTPeripheralsBrown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o32Ram Size4.25K x 8
Voltage - Supply (vcc/vdd)2.7 V ~ 3.6 VData ConvertersA/D 8x8b, 8x12b; D/A 2x12b
Oscillator TypeInternalOperating Temperature-40°C ~ 85°C
Processor SeriesC8051F0xCore8051
Data Bus Width8 bitData Ram Size4.25 KB
Interface TypeI2C/SMBus/SPI/UARTMaximum Clock Frequency25 MHz
Number Of Programmable I/os32Number Of Timers4
Operating Supply Voltage2.7 V to 3.6 VMaximum Operating Temperature+ 85 C
Mounting StyleSMD/SMT3rd Party Development ToolsPK51, CA51, A51, ULINK2
Development Tools By SupplierC8051F020DKMinimum Operating Temperature- 40 C
On-chip Adc8-ch x 8-bit or 8-ch x 12-bitOn-chip Dac2-ch x 12-bit
No. Of I/o's32Ram Memory Size4352Byte
Cpu Speed25MHzNo. Of Timers5
No. Of Pwm Channels5Rohs CompliantYes
Data Rom Size64 KBA/d Bit Size12 bit
A/d Channels Available8Height1.05 mm
Length10 mmSupply Voltage (max)3.6 V
Supply Voltage (min)2.7 VWidth10 mm
Lead Free Status / RoHS StatusLead free / RoHS CompliantFor Use With336-1200 - DEV KIT FOR F020/F021/F022/F023
Eeprom Size-Other names336-1201
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Page 46/272

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C8051F020/1
5.2.3. Settling Time Requirements
When the ADC0 input configuration is changed (i.e., a different MUX or PGA selection is made), a minimum settling
(or tracking) time is required before an accurate conversion can be performed. This settling time is determined by the
ADC0 MUX resistance, the ADC0 sampling capacitance, any external source resistance, and the accuracy required
for the conversion. Figure 5.4 shows the equivalent ADC0 input circuits for both Differential and Single-ended
modes. Notice that the equivalent time constant for both input circuits is the same. The required settling time for a
given settling accuracy (SA) may be approximated by Equation 5.1. When measuring the Temperature Sensor output,
R
reduces to R
. Note that in low-power tracking mode, three SAR clocks are used for tracking at the start of
TOTAL
MUX
every conversion. For most applications, these three SAR clocks will meet the tracking requirements. See Table 5.1
on page 58 for absolute minimum settling/tracking time requirements.
Equation 5.1. ADC0 Settling Time Requirements
Where:
SA is the settling accuracy, given as a fraction of an LSB (for example, 0.25 to settle within 1/4 LSB)
t is the required settling time in seconds
R
is the sum of the ADC0 MUX resistance and any external source resistance.
TOTAL
n is the ADC resolution in bits (12).
Figure 5.4. ADC0 Equivalent Input Circuits
Differential Mode
MUX Select
AIN0.x
R
= 5k
MUX
RC
= R
* C
Input
MUX
SAMPLE
AIN0.y
R
= 5k
MUX
MUX Select
46
n
2
------ -
t
=
ln
R
C
TOTAL
SAMPLE
SA
Single-Ended Mode
MUX Select
AIN0.x
C
= 10pF
SAMPLE
RC
Input
C
= 10pF
SAMPLE
Rev. 1.4
R
= 5k
MUX
C
= 10pF
SAMPLE
= R
* C
MUX
SAMPLE