C8051F311-GM Silicon Laboratories Inc, C8051F311-GM Datasheet - Page 52

• Manufacturer Part Number: C8051F311-GM
• Description: IC 8051 MCU 16K FLASH 28MLP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F31xr

Specifications of C8051F311-GM

• Program Memory Type: FLASH
• Program Memory Size: 16KB (16K x 8)
• Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: POR, PWM, Temp Sensor, WDT
• Number Of I /o: 25
• Ram Size: 1.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 17x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: C8051F3x
• Core: 8051
• 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: 25
• Number Of Timers: 4 bit
• 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: C8051F310DK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 17 Channel
• No. Of I/o's: 25
• Ram Memory Size: 1280Byte
• Cpu Speed: 25MHz
• No. Of Timers: 4
• Rohs Compliant: Yes
• Package: 24QFN EP
• Device Core: 8051
• Family Name: C8051F31x
• Maximum Speed: 25 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 770-1006 - ISP 4PORT FOR SILABS C8051F MCU336-1446 - ADAPTER PROGRAM TOOLSTICK F311336-1253 - DEV KIT FOR C8051F310/F311
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1254

C8051F310/1/2/3/4/5/6/7
Inputs are measured from ‘0’ to VREF * 1023/1024. Example codes are shown below for both right-justified
and left-justified data. Unused bits in the ADC0H and ADC0L registers are set to ‘0’.
When in Differential Mode, conversion codes are represented as 10-bit signed 2’s complement numbers.
Inputs are measured from -VREF to VREF * 511/512. Example codes are shown below for both right-justi-
fied and left-justified data. For right-justified data, the unused MSBs of ADC0H are a sign-extension of the
data word. For left-justified data, the unused LSBs in the ADC0L register are set to ‘0’.
Important Note About ADC0 Input Configuration: Port pins selected as ADC0 inputs should be config-
ured as analog inputs, and should be skipped by the Digital Crossbar. To configure a Port pin for analog
input, set to ‘0’ the corresponding bit in register PnMDIN (for n = 0,1,2,3). To force the Crossbar to skip a
Port pin, set to ‘1’ the corresponding bit in register PnSKIP (for n = 0,1,2). See
Output” on page 129
5.2.
The typical temperature sensor transfer function is shown in Figure 5.2. The output voltage (V
positive ADC input when the temperature sensor is selected by bits AMX0P4-0 in register AMX0P.
52
VREF x 1023/1024
VREF x 512/1024
VREF x 256/1024
–VREF x 256/512
VREF x 256/512
VREF x 511/512
Temperature Sensor
Input Voltage
Input Voltage
–VREF
0
0
Figure 5.2. Typical Temperature Sensor Transfer Function
for more Port I/O configuration details.
1200
1100
1000
(mV)
900
800
700
-50
Right-Justified ADC0H:ADC0L
Right-Justified ADC0H:ADC0L
(AD0LJST = 0)
(AD0LJST = 0)
0
0x03FF
0x0200
0x0100
0x0000
0x01FF
0xFE00
0x0100
0x0000
0xFF00
Rev. 1.7
V
TEMP
50
= 3.35*(TEMP
C
100
) + 897 mV
Left-Justified ADC0H:ADC0L
Left-Justified ADC0H:ADC0L
(Celsius)
(AD0LJST = 1)
(AD0LJST = 1)
Section “13. Port Input/
0xFFC0
0x8000
0x4000
0x0000
0x7FC0
0xC000
0x4000
0x0000
0x8000
TEMP
) is the