Microchip PIC16LF1786低成本血糖仪设计方案

Microchip公司的PIC16LF1786是不8位MCU,工作频率高达32MHz,多达8KB闪存程序存储器,具有超低功耗管理,和多种模拟特性和外设特性.本文介绍了PIC16LF1786主要特性,框图和血糖仪设计主要特性,包括测试原理图,框图,设计指标,电路图和PCB设计文件.
PIC16LF1786主要特性:

High-Performance RISC CPU:
• Only 49 Instructions
• Operating Speed:
- DC – 32 MHz clock input
- DC – 125 ns instruction cycle
• Interrupt Capability with Automatic ContextSaving
• 16-Level Deep Hardware Stack with optionalOverflow/Underflow Reset
• Direct, Indirect and Relative Addressing modes:
• Two full 16-bit File Select Registers (FSRs)
- FSRs can read program and data memory
Memory Features:
• Up to 8 KB Flash Program Memory:
- Self-programmable under software control
- Programmable code protection
- Programmable write protection
• 256 Bytes of Data EEPROM
• Up to 1024 Bytes of RAM
High-Performance PWM Controller:
• Three Programmable Switch Mode Controller(PSMC) modules:
- Digital and/or analog feedback control ofPWM frequency and pulse begin/end times
- 16-bit Period, Duty Cycle and Phase
- 16 ns clock resolution
- Supports Single PWM, Complementary,Push-Pull and 3-phase modes of operation
- Dead-band control with 8-bit counter
- Auto-shutdown and restart
- Leading and falling edge blanking
- Burst mode
Extreme Low-Power ManagementPIC16LF1784/6/7 with XLP:
• Sleep mode: 50 nA @ 1.8V, typical
• Watchdog Timer: 500 nA @ 1.8V, typical
• Timer1 Oscillator: 500 nA @ 32 kHz
• Operating Current:
- 8A @ 32 kHz, 1.8V, typical
- 32A/MHz @ 1.8V, typical
Analog Peripheral Features:
• Analog-to-Digital Converter (ADC):
- Fully differential 12-bit converter
- Up to 75 ksps conversion rate
- 11 single-ended channels
- 5 differential channels
- Positive and negative reference sel...