C8051F560-TB Silicon Laboratories Inc, C8051F560-TB Datasheet - Page 48
![BOARD PROTOTYPE W/C8051F560](/photos/9/25/92557/c8051f560-tb_sml.jpg)
C8051F560-TB
Manufacturer Part Number
C8051F560-TB
Description
BOARD PROTOTYPE W/C8051F560
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Datasheet
1.TOOLSTICK560DC.pdf
(302 pages)
Specifications of C8051F560-TB
Contents
Board
Processor To Be Evaluated
C8051F56x
Processor Series
C8051F56x
Interface Type
USB
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
1.8 V to 5.25 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051F55x, C8051F56x, C8051F57x
For Use With
336-1691 - KIT DEVELOPMENT FOR C8051F560
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1694
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- Download datasheet (3Mb)
C8051F55x/56x/57x
6.1. Modes of Operation
In a typical system, ADC0 is configured using the following steps:
1. If a gain adjustment is required, refer to Section “6.3. Selectable Gain” on page 53.
2. Choose the start of conversion source.
3. Choose Normal Mode or Burst Mode operation.
4. If Burst Mode, choose the ADC0 Idle Power State and set the Power-Up Time.
5. Choose the tracking mode. Note that Pre-Tracking Mode can only be used with Normal Mode.
6. Calculate the required settling time and set the post convert-start tracking time using the AD0TK bits.
7. Choose the repeat count.
8. Choose the output word justification (Right-Justified or Left-Justified).
9. Enable or disable the End of Conversion and Window Comparator Interrupts.
6.1.1. Starting a Conversion
A conversion can be initiated in one of four ways, depending on the programmed states of the ADC0 Start
of Conversion Mode bits (AD0CM1 – 0) in register ADC0CN. Conversions may be initiated by one of the fol-
lowing:
Writing a 1 to AD0BUSY provides software control of ADC0 whereby conversions are performed "on-
demand.” During conversion, the AD0BUSY bit is set to logic 1 and reset to logic 0 when the conversion is
complete. The falling edge of AD0BUSY triggers an interrupt (when enabled) and sets the ADC0 interrupt
flag (AD0INT). Note: When polling for ADC conversion completions, the ADC0 interrupt flag (AD0INT)
should be used. Converted data is available in the ADC0 data registers, ADC0H:ADC0L, when bit AD0INT
is logic 1. Note that when Timer 2 overflows are used as the conversion source, Low Byte overflows are
used if Timer2 is in 8-bit mode; High byte overflows are used if Timer 2 is in 16-bit mode. See Section
“25. Timers” on page 255 for timer configuration.
Important Note About Using CNVSTR: The CNVSTR input pin also functions as Port pin P0.1. When the
CNVSTR input is used as the ADC0 conversion source, Port pin P0.1 should be skipped by the Digital
Crossbar. To configure the Crossbar to skip P0.1, set to 1 Bit1 in register P0SKIP. See Section “19. Port
Input/Output” on page 167 for details on Port I/O configuration.
6.1.2. Tracking Modes
Each ADC0 conversion must be preceded by a minimum tracking time for the converted result to be accu-
rate. ADC0 has three tracking modes: Pre-Tracking, Post-Tracking, and Dual-Tracking. Pre-Tracking Mode
provides the minimum delay between the convert start signal and end of conversion by tracking continu-
ously before the convert start signal. This mode requires software management in order to meet minimum
tracking requirements. In Post-Tracking Mode, a programmable tracking time starts after the convert start
signal and is managed by hardware. Dual-Tracking Mode maximizes tracking time by tracking before and
after the convert start signal. Figure 6.2 shows examples of the three tracking modes.
Pre-Tracking Mode is selected when AD0TM is set to 10b. Conversions are started immediately following
the convert start signal. ADC0 is tracking continuously when not performing a conversion. Software must
allow at least the minimum tracking time between each end of conversion and the next convert start signal.
The minimum tracking time must also be met prior to the first convert start signal after ADC0 is enabled.
48
Writing a 1 to the AD0BUSY bit of register ADC0CN
A rising edge on the CNVSTR input signal (pin P0.1)
A Timer 1 overflow (i.e., timed continuous conversions)
A Timer 2 overflow (i.e., timed continuous conversions)
Rev. 1.1
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