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PIC18F87J72 Datasheet(PDF) 10 Page - Microchip Technology |
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PIC18F87J72 Datasheet(HTML) 10 Page - Microchip Technology |
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10 / 480 page  PIC18F87J72 FAMILY DS39979A-page 10 Preliminary 2010 Microchip Technology Inc. 1.2 Analog Features • Dual-Channel, 24-Bit ADC Front End (AFE): This module contains two synchronous sampling, Analog-to-Digital (A/D) Converters, plus sup- porting Programmable Gain Amplifiers (PGAs) and an internal voltage reference, to perform high-accuracy and low noise analog conversions. The AFE is controlled, and its data read, through a dedicated, high-speed (20 MHz) SPI interface. • 12-Bit A/D Converter: In addition to the AFE, PIC18F87J72 family devices also include a stan- dard SAR A/D Converter with 12 independent analog inputs. The module incorporates program- mable acquisition time, allowing for a channel to be selected and a conversion to be initiated without waiting for a sampling period and thus, reducing code overhead. • Charge Time Measurement Unit (CTMU): The CTMU is a flexible analog module that provides accurate differential time measurement between pulse sources, as well as asynchronous pulse generation. Together with other on-chip analog modules, the CTMU can precisely measure time, measure capacitance or relative changes in capacitance, or generate output pulses that are independent of the system clock. 1.3 LCD Driver The on-chip LCD driver includes many features that make the integration of displays in low-power applications easier. These include an integrated volt- age regulator with charge pump that allows contrast control in software and display operation above device VDD. 1.4 Other Special Features • Communications: The PIC18F87J72 family incorporates a range of serial communication peripherals, including an Addressable USART, a separate Enhanced USART that supports LIN/J2602 specification 1.2, and one Master SSP module capable of both SPI and I2C™ (Master and Slave) modes of operation. • CCP Modules: All devices in the family incorporate two Capture/Compare/PWM (CCP) modules. Up to four different time bases may be used to perform several different operations at once. • Extended Watchdog Timer (WDT): This enhanced version incorporates a 16-bit prescaler, allowing an extended time-out range that is stable across operating voltage and temperature. See Section 29.0 “Electrical Characteristics” for time-out periods. • Real Time Clock and Calendar Module (RTCC): The RTCC module is intended for applications requiring that accurate time be maintained for extended periods of time with minimum to no intervention from the CPU. The module is a 100-year clock and calendar with automatic leap year detection. The range of the clock is from 00:00:00 (midnight) on January 1, 2000 to 23:59:59 on December 31, 2099. |
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