C8051F067-GQ Silicon Laboratories Inc, C8051F067-GQ Datasheet - Page 88

• Manufacturer Part Number: C8051F067-GQ
• Description: IC 8051 MCU 32K FLASH 64TQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F06xr

Specifications of C8051F067-GQ

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 4.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 2x16b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• Processor Series: C8051F0x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 4.25 KB
• Interface Type: I2C, SMBus, SPI, UART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 24
• 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: C8051F060DK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 16 bit, 1 Channel
• On-chip Dac: 12 bit, 2 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 336-1222

C8051F060/1/2/3/4/5/6/7
7.1.
The analog multiplexer (AMUX2) selects the inputs to the ADC, allowing any of the pins on Port 1 to be
measured in single-ended mode, or as a differential pair. Additionally, the on-chip temperature sensor may
be selected as a single-ended input. The ADC2 input channels are configured and selected in the
AMX2CF and AMX2SL registers as described in Figure 7.5 and Figure 7.6, respectively. In Single-ended
Mode, the selected pin is measured with respect to AGND. In Differential Mode, the selected differential
pair is measured with respect to one another. The polarity of the differential measurement depends on the
setting of the AMX2AD3-0 bits in the AMX2SL register. For example, if pins AIN2.0 and AIN2.1 are config-
ured for differential measurement (AIN01IC = 1), and AMX2AD3-0 = 0000b, the ADC will measure the volt-
age (AIN2.0 - AIN2.1). If AMX2AD3-0 is changed to 0001b, the ADC will measure the same voltage, with
opposite polarity (AIN2.1 - AIN2.0).
The conversion code format differs between Single-ended and Differential modes. The registers ADC2H
and ADC2L contain the high and low bytes of the output conversion code from the ADC at the completion
of each conversion. Data can be right-justified or left-justified, depending on the setting of the AD2LJST bit
(ADC2CN.0). When in Single-ended Mode, conversion codes are represented as 10-bit unsigned integers.
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 ADC2H and ADC2L 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 ADC2H are a sign-extension of the
data word. For left-justified data, the unused LSBs in the ADC2L register are set to ‘0’.
Important Note About ADC2 Input Configuration: Port 1 pins selected as ADC2 inputs should be con-
figured as analog inputs. To configure a Port 1 pin for analog input, set to ‘1’ the corresponding bit in regis-
ter P1MDIN. Port 1 pins used as ADC2 inputs will be skipped by the crossbar for peripheral assignments.
See
The Temperature Sensor transfer function is shown in Figure 7.2 on Page 89. The output voltage (V
is a single-ended input to ADC2 when the Temperature Sensor is selected by bits AMX2AD3-0 in register
AMX2SL. Typical values for the Slope and Offset parameters can be found in Table 7.1.
88
VREF * 1023/1024
VREF * 512/1024
VREF * 256/1024
-VREF * 256/512
VREF * 256/512
VREF * 511/512
Section “18. Port Input/Output” on page 203
Input Voltage
Input Voltage
Analog Multiplexer
- VREF
0
0
Right-Justified ADC2H:ADC2L
Right-Justified ADC2H:ADC2L
(AD2LJST = 0)
(AD2LJST = 0)
0xFE00
0x01FF
0xFF00
0x0100
0x0000
0x03FF
0x0200
0x0100
0x0000
for more Port I/O configuration details.
Rev. 1.2
Left-Justified ADC2H:ADC2L
Left-Justified ADC2H:ADC2L
(AD2LJST = 1)
(AD2LJST = 1)
0xFFC0
0x7FC0
0xC000
0x8000
0x4000
0x0000
0x4000
0x0000
0x8000
TEMP
)