C8051F130 Silicon Laboratories Inc, C8051F130 Datasheet - Page 35
C8051F130
Manufacturer Part Number
C8051F130
Description
IC 8051 MCU 128K FLASH 100TQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F13xr
Specifications of C8051F130
Core Processor
8051
Core Size
8-Bit
Speed
100MHz
Connectivity
EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
64
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
8.25K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Other names
336-1147
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1.9.
The C8051F12x devices have an on-board 8-bit SAR ADC (ADC2) with an 8-channel input multiplexer and
programmable gain amplifier. This ADC features a 500 ksps maximum throughput and true 8-bit linearity
with an INL of ±1LSB. Eight input pins are available for measurement. The ADC is under full control of the
CIP-51 microcontroller via the Special Function Registers. The ADC2 voltage reference is selected
between the analog power supply (AV+) and an external VREF pin. On the 100-pin TQFP devices, ADC2
has its own dedicated Voltage Reference input pin; on the 64-pin TQFP devices, ADC2 shares a Voltage
Reference input pin with ADC0. User software may put ADC2 into shutdown mode to save power.
A programmable gain amplifier follows the analog multiplexer. The gain stage can be especially useful
when different ADC input channels have widely varied input voltage signals, or when it is necessary to
"zoom in" on a signal with a large DC offset (in differential mode, a DAC could be used to provide the DC
offset). The PGA gain can be set in software to 0.5, 1, 2, or 4.
A flexible conversion scheduling system allows ADC2 conversions to be initiated by software commands,
timer overflows, or an external input signal. ADC2 conversions may also be synchronized with ADC0 soft-
ware-commanded conversions. Conversion completions are indicated by a status bit and an interrupt (if
enabled), and the resulting 8-bit data word is latched into an SFR upon completion.
AIN2.0
AIN2.1
AIN2.2
AIN2.3
AIN2.4
AIN2.5
AIN2.6
AIN2.7
8-Bit Analog to Digital Converter
Analog Multiplexer
AMUX
8-to-1
Figure 1.14. 8-Bit ADC Diagram
Programmable Gain
X
Amplifier
External VREF
Configuration, Control, and Data Registers
+
-
AV+
AV+
Pin
Rev. 1.4
C8051F120/1/2/3/4/5/6/7
ADC
VREF
8-Bit
SAR
Start Conversion
C8051F130/1/2/3
8
Compare
Window
Logic
Write to AD2BUSY
Timer 3 Overflow
CNVSTR2 Input
Timer 2 Overflow
Write to AD0BUSY
(synchronized with
ADC0)
ADC Data
Register
Conversion
Compare
Complete
Interrupt
Window
Interrupt
35
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