C8051F061 Silicon Laboratories Inc, C8051F061 Datasheet - Page 89
C8051F061
Manufacturer Part Number
C8051F061
Description
IC 8051 MCU 64K FLASH 64TQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F06xr
Specifications of C8051F061
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
CAN, SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
24
Program Memory Size
64KB (64K 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, 8x10b; D/A 2x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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7.2.
ADC2 has a maximum conversion speed of 200 ksps. The ADC2 conversion clock is a divided version of
the system clock, determined by the AD2SC bits in the ADC2CF register (system clock divided by (AD2SC
+ 1) for 0 AD2SC 31). The ADC2 conversion clock should be no more than 3 MHz.
7.2.1. Starting a Conversion
A conversion can be initiated in one of four ways, depending on the programmed states of the ADC2 Start
of Conversion Mode bits (AD2CM1-0) in register ADC2CN. Conversions may be initiated by one of the fol-
lowing:
When CNVSTR2 is used as a conversion start source, it must be enabled in the crossbar, and the corre-
sponding pin must be set to open-drain, high-impedance mode (see
page 203
Writing a ‘1’ to AD2BUSY provides software control of ADC2 whereby conversions are performed "on-
demand". During conversion, the AD2BUSY bit is set to logic 1 and reset to logic 0 when the conversion is
complete. The falling edge of AD2BUSY triggers an interrupt (when enabled) and sets the ADC2 interrupt
flag (AD2INT). Note: When polling for ADC conversion completions, the ADC2 interrupt flag (AD2INT)
should be used. Converted data is available in the ADC2 data registers, ADC2H and ADC2L, when bit
AD2INT is logic 1. Note that when Timer 2 or Timer 3 overflows are used as the conversion source, low
byte overflows are used if the timer is in 8-bit mode; and high byte overflows are used if the timer is in 16-
bit mode. See
Modes of Operation
1. Writing a ‘1’ to the AD2BUSY bit of register ADC2CN
2. A Timer 3 overflow (i.e. timed continuous conversions)
3. A rising edge on the CNVSTR2 input signal (Assigned by the crossbar)
4. A Timer 2 overflow
for more details on Port I/O configuration).
Section “24. Timers” on page 287
Figure 7.2. Temperature Sensor Transfer Function
-50
Temperature (Celsius)
0
for timer configuration.
Rev. 1.2
V
Temp
TEMP
=
C
C8051F060/1/2/3/4/5/6/7
= (V
(Slope
Offset
TEMP
50
x Temp
- Offset) /
(V at 0 Celsius)
Slope
C
) +
(V / deg C)
Section “18. Port Input/Output” on
Slope
Offset
100
89
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