C8051F019 Silicon Laboratories Inc, C8051F019 Datasheet - Page 42
![IC 8051 MCU 16K FLASH 48TQFP](/photos/15/92/159280/tqfp-48_sml.jpg)
C8051F019
Manufacturer Part Number
C8051F019
Description
IC 8051 MCU 16K FLASH 48TQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F018r
Specifications of C8051F019
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
16
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1.25K x 8
Voltage - Supply (vcc/vdd)
2.8 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
48-TQFP, 48-VQFP
Data Bus Width
8 bit
Data Ram Size
1.25 KB
Interface Type
I2C, SMBus, SPI, UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
16
Number Of Timers
16 bit
Operating Supply Voltage
2.8 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Lead Free Status / Rohs Status
No
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F019
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
Company:
Part Number:
C8051F019-GQ
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
Company:
Part Number:
C8051F019-GQR
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
Company:
Part Number:
C8051F019R
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
7. VOLTAGE REFERENCE
The voltage reference circuit consists of a 1.2V, 15ppm/C (typical) bandgap voltage reference generator and a
gain-of-two output buffer amplifier. The reference voltage on VREF can be connected to external devices in the
system, as long as the maximum load seen by the VREF pin is less than 200A to AGND (see Figure 7.1).
If a different reference voltage is required, an external reference can be connected to the VREF pin and the internal
bandgap and buffer amplifier disabled in software. The external reference voltage must still be less than AV+ -
0.3V. The Reference Control Register, REF0CN (defined in Figure 7.2), provides the means to enable or disable
the bandgap and buffer amplifier. The BIASE bit in REF0CN enables the bias circuitry for the ADC while the
REFBE bit enables the bandgap reference and buffer amplifier which drive the VREF pin. When disabled, the
supply current drawn by the bandgap and buffer amplifier falls to less than 1A (typical) and the output of the
buffer amplifier enters a high impedance state. If the internal bandgap is used as the reference voltage generator,
BIASE and REFBE must both be set to 1. If an external reference is used, REFBE must be set to 0 and BIASE
must be set to 1. If the ADC is not being used, both of these bits can be set to 0 to conserve power. The electrical
specifications for the Voltage Reference are given in Table 7.1.
The temperature sensor connects to the highest order input of the A/D converter’s input multiplexer. The TEMPE
bit within REF0CN enables and disables the temperature sensor. While disabled, the temperature sensor defaults to
a high impedance state and any A/D measurements performed on the sensor while disabled result in meaningless
data.
External Equivalent
Load Circuit
AGND
AGND
AV+
RLOAD
R1
Reference
External
Voltage
Circuit
Figure 7.1. Voltage Reference Functional Block Diagram
VREF
TEMPE
REFBE
BIASE
Rev. 1.2
EN
EN
Reference
Generator
2.4V
Bias
EN
AGND
AGND
Sensor
Temp
C8051F018
C8051F019
(to Analog Mux)
(Bias to ADC)
(to ADC)
42