C8051F124-GQ Silicon Laboratories Inc, C8051F124-GQ Datasheet - Page 115

• Manufacturer Part Number: C8051F124-GQ
• Description: IC 8051 MCU 128K FLASH 100TQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F12xr

Specifications of C8051F124-GQ

• Program Memory Type: FLASH
• Program Memory Size: 128KB (128K x 8)
• Package / Case: 100-TQFP, 100-VQFP
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 50MHz
• Connectivity: EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 64
• Ram Size: 8.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x8b, 8x12b; D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: C8051F1x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 8.25 KB
• Interface Type: I2C/SMBus/SPI/UART
• Maximum Clock Frequency: 50 MHz
• Number Of Programmable I/os: 64
• Number Of Timers: 5
• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: C8051F120DK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 8-bit or 8-ch x 12-bit
• On-chip Dac: 2-ch x 12-bit
• Package: 100TQFP
• Device Core: 8051
• Family Name: C8051F12x
• Maximum Speed: 50 MHz
• No. Of I/o's: 64
• Ram Memory Size: 8448Byte
• Cpu Speed: 50MHz
• No. Of Timers: 5
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 336-1224 - DEVKIT-F120/21/22/23/24/25/26/27
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1228

9.2.
On the C8051F121/3/5/7 devices, the REF0CN register also allows selection of the voltage reference
source for ADC0 and ADC2, as shown in SFR Definition 9.2. Bits AD0VRS and AD2VRS in the REF0CN
register select the ADC0 and ADC2 voltage reference sources, respectively. The VREFA pin provides a
voltage reference input for ADC0 and ADC2, which can be connected to an external precision reference or
the internal voltage reference. ADC0 may also reference the DAC0 output internally, and ADC2 may refer-
ence the analog power supply voltage, via the VREF multiplexers shown in Figure 9.2.
Figure 9.2. Voltage Reference Functional Block Diagram (C8051F121/3/5/7)
Reference Configuration on the C8051F121/3/5/7
Reference
External
Voltage
Circuit
DGND
VDD
Recommended Bypass
4.7F
R1
Capacitors
+
0.1F
VREFA
VREF
Rev. 1.4
REF0CN
C8051F120/1/2/3/4/5/6/7
DAC0
DAC1
Ref
REFBE
x2
AV+
1
0
0
1
C8051F130/1/2/3
Band-Gap
BIASE
1.2V
EN
ADC2
ADC0
Ref
Ref
Bias to
ADCs,
DACs
115