C8051F960-A-GQ Silicon Labs, C8051F960-A-GQ Datasheet - Page 78
C8051F960-A-GQ
Manufacturer Part Number
C8051F960-A-GQ
Description
8-bit Microcontrollers - MCU 128KB DC-DC LCD AES
Manufacturer
Silicon Labs
Datasheet
1.C8051F960-A-GQ.pdf
(492 pages)
Specifications of C8051F960-A-GQ
Rohs
yes
Core
8051
Processor Series
C8051
Data Bus Width
8 bit
Maximum Clock Frequency
24.5 MHz
Program Memory Size
128 KB
Data Ram Size
8 KB
On-chip Adc
Yes
Operating Supply Voltage
1.8 V to 3.8 V
Operating Temperature Range
- 40 C to + 85 C
Package / Case
QFP-80
Mounting Style
SMD/SMT
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C8051F96x
5. SAR ADC with 16-bit Auto-Averaging Accumulator and
The ADC0 on C8051F96x devices is a 300 ksps, 10-bit or 75 ksps, 12-bit successive-approximation-regis-
ter (SAR) ADC with integrated track-and-hold and programmable window detector. ADC0 also has an
autonomous low power Burst Mode which can automatically enable ADC0, capture and accumulate sam-
ples, then place ADC0 in a low power shutdown mode without CPU intervention. It also has a 16-bit accu-
mulator that can automatically oversample and average the ADC results. See Section 5.4 for more details
on using the ADC in 12-bit mode.
The ADC is fully configurable under software control via Special Function Registers. The ADC0 operates in
Single-ended mode and may be configured to measure various different signals using the analog multi-
plexer described in “5.7. ADC0 Analog Multiplexer” on page 95. The voltage reference for the ADC is
selected as described in “5.9. Voltage and Ground Reference Options” on page 100.
5.1. Output Code Formatting
The registers ADC0H and ADC0L 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 AD0SJST[2:0]. When the repeat count is set to 1, conversion codes are represented as 10-
bit unsigned integers. Inputs are measured from 0 to VREF x 1023/1024. Example codes are shown below
for both right-justified and left-justified data. Unused bits in the ADC0H and ADC0L registers are set to 0.
78
Autonomous Low Power Burst Mode
ADC0PWR
ADC0TK
AMUX0
From
Figure 5.1. ADC0 Functional Block Diagram
Burst Mode Logic
AIN+
ADC0CF
10/12-Bit
ADC
VDD
SAR
Rev. 0.5
ADC0GTH ADC0GTL
ADC0LTH
ADC0CN
ADC0LTL
Conversion
Start
100
000
001
010
011
32
16-Bit Accumulator
AD0WINT
Compare
Window
CNVSTR Input
AD0BUSY (W)
Timer 0 Overflow
Timer 2 Overflow
Timer 3 Overflow
Logic
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