C8051F330DK Silicon Laboratories Inc, C8051F330DK Datasheet - Page 42

DEV KIT FOR C8051F330/F331

C8051F330DK

Manufacturer Part Number
C8051F330DK
Description
DEV KIT FOR C8051F330/F331
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Datasheets

Specifications of C8051F330DK

Contents
Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
Processor To Be Evaluated
C8051F33x
Interface Type
RS-232
Operating Supply Voltage
7 V to 15 V
Silicon Manufacturer
Silicon Labs
Core Architecture
8051
Silicon Core Number
C8051F330
Silicon Family Name
C8051F33x
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
Silicon Laboratories C8051F330, C8051F331
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1264
5.3.2. Tracking Modes
Each ADC0 conversion must be preceded by a minimum tracking time in order for the converted result to
be accurate. The minimum tracking time is given in Table 5.1. The AD0TM bit in register ADC0CN controls
the ADC0 track-and-hold mode. In its default state, the ADC0 input is continuously tracked, except when a
conversion is in progress. When the AD0TM bit is logic 1, ADC0 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,
ADC0 tracks only when CNVSTR is low; conversion begins on the rising edge of CNVSTR (see
Figure 5.3). Tracking can also be disabled (shutdown) when the device is in low power standby or sleep
modes. Low-power track-and-hold mode is also useful when AMUX settings are frequently changed, due
to the settling time requirements described in
(AD0CM[2:0]=000, 001,010
Timer 1, Timer 3 Overflow
Write '1' to AD0BUSY,
(AD0CM[2:0]=100)
Timer 0, Timer 2,
Figure 5.3. 10-Bit ADC Track and Conversion Example Timing
SAR Clocks
SAR Clocks
SAR Clocks
AD0TM=1
AD0TM=0
011, 101)
AD0TM=1
AD0TM=0
CNVSTR
Low Power
or Convert
Low Power
or Convert
Track or
Convert
A. ADC0 Timing for External Trigger Source
Track or Convert
B. ADC0 Timing for Internal Trigger Source
1
1
Section “5.3.3. Settling Time Requirements” on page
Track
2
2
Track
Rev. 1.7
3
3
4
4
1
5
5
Convert
2
6
6
3
7
7
C8051F330/1/2/3/4/5
4
8
Convert
8
Convert
Convert
5
9
9
6
10 11 12
10 11
7
8
9
13 14
10 11
Low Power Mode
Track
Low Power
Mode
Track
46.
45

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