C8051F020-TB Silicon Laboratories Inc, C8051F020-TB Datasheet - Page 76
C8051F020-TB
Manufacturer Part Number
C8051F020-TB
Description
BOARD PROTOTYPING W/C8051F020
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F020-TB
Contents
Board
Processor To Be Evaluated
C8051F02x
Interface Type
USB
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051F020
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
- Current page: 76 of 272
- Download datasheet (2Mb)
C8051F020/1/2/3
7.2.
ADC1 has a maximum conversion speed of 500 ksps. The ADC1 conversion clock (SAR1 clock) is a divided version
of the system clock, determined by the AD1SC bits in the ADC1CF register (system clock divided by (AD1SC + 1)
for 0 AD1SC 31). The maximum ADC1 conversion clock is 6 MHz.
7.2.1. Starting a Conversion
A conversion can be initiated in one of five ways, depending on the programmed states of the ADC1 Start of Conver-
sion Mode bits (AD1CM2-0) in register ADC1CN. Conversions may be initiated by:
During conversion, the AD1BUSY bit is set to logic 1 and restored to 0 when conversion is complete. The falling
edge of AD1BUSY triggers an interrupt (when enabled) and sets the interrupt flag in ADC1CN. Converted data is
available in the ADC1 data word, ADC1.
When a conversion is initiated by writing a ‘1’ to AD1BUSY, it is recommended to poll AD1INT to determine when
the conversion is complete. The recommended procedure is:
7.2.2. Tracking Modes
The AD1TM bit in register ADC1CN controls the ADC1 track-and-hold mode. In its default state, the ADC1 input is
continuously tracked, except when a conversion is in progress. When the AD1TM bit is logic 1, ADC1 operates in
low-power track-and-hold mode. In this mode, each conversion is preceded by a tracking period of 3 SAR clocks
(after the start-of-conversion signal). When the CNVSTR signal is used to initiate conversions in low-power tracking
mode, ADC1 tracks only when CNVSTR is low; conversion begins on the rising edge of CNVSTR (see Figure 7.2).
Tracking can also be disabled (shutdown) when the entire chip is in low power standby or sleep modes. Low-power
Track-and-Hold mode is also useful when AMUX or PGA settings are frequently changed, due to the settling time
requirements described in
76
ADC1 Modes of Operation
1.
2.
3.
4.
5.
single software command).
Step 1. Write a ‘0’ to AD1INT;
Step 2. Write a ‘1’ to AD1BUSY;
Step 3. Poll AD1INT for ‘1’;
Step 4. Process ADC1 data.
Writing a ‘1’ to the AD1BUSY bit of ADC1CN;
A Timer 3 overflow (i.e. timed continuous conversions);
A rising edge detected on the external ADC convert start signal, CNVSTR;
A Timer 2 overflow (i.e. timed continuous conversions);
Writing a ‘1’ to the AD0BUSY of register ADC0CN (initiate conversion of ADC1 and ADC0 with a
Section “7.2.3. Settling Time Requirements” on page
Rev. 1.4
78.
Related parts for C8051F020-TB
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
SMD/C°/SINGLE-ENDED OUTPUT SILICON OSCILLATOR
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
N/A N/A/SI4010 AES KEYFOB DEMO WITH LCD RX
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
N/A N/A/SI4010 SIMPLIFIED KEY FOB DEMO WITH LED RX
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
N/A/-40 TO 85 OC/EZLINK MODULE; F930/4432 HIGH BAND (REV E/B1)
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
EZLink Module; F930/4432 Low Band (rev e/B1)
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
I°/4460 10 DBM RADIO TEST CARD 434 MHZ
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
I°/4461 14 DBM RADIO TEST CARD 868 MHZ
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
I°/4463 20 DBM RFSWITCH RADIO TEST CARD 460 MHZ
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
I°/4463 20 DBM RADIO TEST CARD 868 MHZ
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
I°/4463 27 DBM RADIO TEST CARD 868 MHZ
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
I°/4463 SKYWORKS 30 DBM RADIO TEST CARD 915 MHZ
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
N/A N/A/-40 TO 85 OC/4463 RFMD 30 DBM RADIO TEST CARD 915 MHZ
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
I°/4463 20 DBM RADIO TEST CARD 169 MHZ
Manufacturer:
Silicon Laboratories Inc