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- #ANALOG TO DIGITAL CONVERTER REFERENCE VOLTAGE SERIAL#
- #ANALOG TO DIGITAL CONVERTER REFERENCE VOLTAGE FULL#
- #ANALOG TO DIGITAL CONVERTER REFERENCE VOLTAGE SERIES#
#ANALOG TO DIGITAL CONVERTER REFERENCE VOLTAGE FULL#
Figure 4 shows a full SFR memory map and SFR contents on Reset. The SFR registers include control, configuration and data registers that provide an interface between the CPU and other on- chip peripherals. Power ON Default Value 00H B SFR BĪDuC812 SPECIAL FUNCTION REGISTERS All registers except the program counter and the four general purpose register banks, reside in the special function register (SFR) area. The mnemonics for SFR Address 87H accumulator-specific instructions refer to the Accumulator as A. SELECTED (BIT ADDRESSES 0FH–7FH) VIA The chip incorporates all secondary functions to fully support 20H BITS IN PSW 1FH the programmable data acquĪDuC812 OVERVIEW OF MCU-RELATED SFRs Power Control SFR Accumulator SFR The Power Control (PCON) register contains bits for power- ACC is the Accumulator register and is used for math opera- saving options and general-purpose status flags as shown in tions including addition, subtraction, integer multiplication and Table II. At its core, the ADuC812 incorporates a high- perfor- mance 8-bit (8052-Compatible) MCU with on-chip 2FH reprogrammable nonvolatile Flash program memory control- BANKS BIT-ADDRESSABLE SPACE ling a multichannel (8-input channels), 12-bit ADC. ALE O Address LatĪDuC812 ARCHITECTURE, MAIN FEATURES 7FH The ADuC812 is a highly integrated true 12-bit data acquisition system.
#ANALOG TO DIGITAL CONVERTER REFERENCE VOLTAGE SERIAL#
PSEN can also be used to enable serial download mode when pulled low through a resistor on power-up or RESET. This pin remains high during internal program execution. It is active every six oscillator periods except during external data memory accesses. This output is a control signal that enables the external program memory to the bus during external fetch operations. The nominal internal reference voltage is 2.5 V and this appĪDuC812 PIN FUNCTION DESCRIPTION (continued) Mnemonic Type Function PSEN O Program Store Enable, Logic Output.
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#ANALOG TO DIGITAL CONVERTER REFERENCE VOLTAGE SERIES#
This pin is connected to the internal reference through a series resistor and is the REF reference source for the analog-to-digital converter. Connect 0.1 µ F between this pin and AGND. –0.3 V, DV + 0.3 V DD 1 39 P1.0/ADC0/T2 P2.7/A15/A23 PIN 1 V toĪDuC812 PIN FUNCTION DESCRIPTIONS Mnemonic Type Function DV P Digital Positive Supply Voltage, 3 V or 5 V Nominal DD AV P Analog Positive Supply Voltage, 3 V or 5 V Nominal DD C I Decoupling Input for On-Chip Reference. –0.3 V to +7 V DD DD Digital Input Voltage to DGND. All specifications T = T to T, unless otherwise noted.) SAMPLE OUT L L A MIN MAX ADuC812BS Parameter V = 5 V V = 3 V Unit Test Conditions/Comments DD DD ADC CHANNEL SPECIFICATIONS 3, 4 DC ACCURACY Resolution 12 12 Bits Integral Nonlinearity ☑/2 ☑/2 LSB typ f = 100 kHz SAMPLE ☑.5 LSB max f = 100ġ, 2 ADuC812–SPECIFICATIONS (continued) ADuC812BS Parameter V = 5 V V = 3 V Unit Test Conditions/Comments DD DD DAC AC CHARACTERISTICS Voltage Output Settling Time 15 15 µ s typ Full-Scale Settling Time to Within 1/2 LSB of Final Value Digital-to-Analog Glitch Energy 10 10 nV sec typ 1 LSB Change at Major Carry REFERENCE INPUT/OUTPUT 9 REF Input Voltage Range 2.3/V 2.3/V V min/max IN DD DD Input Impedance 150 150 kΩ typ REF Output Voltage 2.5 ☒.5% V min/max Initial Tolerance 25☌ĪDuC812 ADuC812BS Parameter V = 5 V V = 3 V Unit Test Conditions/Comments DD DD DIGITAL OUTPUTS Output High Voltage (V ) 2.4 V min V = 4.5 V to 5.5 V OH DD I = 80 µ A SOURCE 4.0 2.6 V typ V = 2.7 V to 3.3 V DD I = 20 µ A SOURCE Output Low Voltage (V ) OL ALE, PSEN, Ports 0 and 2 0.4 V max I = 1.6 mA SINK 0.2 0.2 V typ I = 1.6 mA SINK Port 3 0.4 V max I = 8 mA SINK 0.2 0.2 V typ I = 8 mA SINK Floating State Leakage Current ☑0 µ A max ±5 ±5 µ A typ Floating State Output Capacitance 10ĪDuC812 ABSOLUTE MAXIMUM RATINGS* PIN CONFIGURATION (T = 25☌ unless otherwise noted) A AV to DV. 26 ABSOLUTE MAXIMUMĪDuC812 1, 2 (AV = DV = 3.0 V or 5.0 V A0%, REF /REF = 2.5 V Internal Reference, MCLKIN = 11.0592 MHz, SPECIFICATIONS DD DD IN OUT f = 200 kHz, DAC V Load to AGND R = 2 k, C = 100 pF. 3 MOSI (Master Out, Slave In Pin), Pin #27. 1 MISO (Master In, Slave Out Data I/O Pin), Pin #19. ® MicroConverter, Multichannel a 12-Bit ADC with Embedded FLASH MCU ADuC812 FEATURES APPLICATIONS ANALOG I/O Intelligent Sensors Calibration and Conditioning 8-Channel, High Accuracy 12-Bit ADC Battery Powered Systems (Portable PCs, Instruments, On-Chip, 100 ppm/< Voltage Reference Monitors) High-Speed 200 kSPS Transient Capture Systems DMA Controller for High-Speed ADC-to-RAM Capture DAS and Communications Systems Two 12-Bit Voltage Output DACs Control Loop Monitors (Optical Networks/Base StaĪDuC812 TABLE OF CONTENTS FEATURES.