Описание
The PIC12LCE674 device is low-cost, high-performance, CMOS, fully-static, 8-bit microcontrollers with integrated analog-to-digital (A/D) converter and EEPROM data memory (EEPROM on PIC12CE67X versions only). All PICmicro microcontrollers employ an advanced RISC architecture. The PIC12LCE674 microcontrollers have enhanced core features, eight-level deep stack, and multiple internal and external interrupt sources. The separate instruction and data buses of the Harvard architecture allow a 14-bit wide instruction word with the separate 8-bit wide data. The two stage instruction pipeline allows all instructions to execute in a single cycle, except for program branches, which require two cycles. A total of 35 instructions (reduced instruction set) are available. Additionally, a large register set gives some of the architectural innovations used to achieve a very high performance. PIC12LCE674 microcontrollers typically achieve a 2:1 code compression and a 4:1 speed improvement over other 8-bit microcontrollers in their class. The PIC12LCE674 devices have 128 bytes of RAM, 16 bytes of EEPROM data memory (PIC12CE67X only), 5 I/O pins and 1 input pin. In addition a timer/counter is available. Also a 4-channel, high-speed, 8-bit A/D is provided. The 8-bit resolution is ideally suited for applications requiring low-cost analog interface, (i.e., thermostat control, pressure sensing, etc.) The PIC12LCE674 devices have special features to reduce external components, thus reducing cost, enhancing system reliability and reducing power consumption. The Power-On Reset (POR), Power-up Timer (PWRT), and Oscillator Start-up Timer (OST) eliminate the need for external reset circuitry. There are five oscillator configurations to choose from, including INTRC precision internal oscillator mode and the power-saving LP (Low Power) oscillator mode. Powersaving SLEEP mode, Watchdog Timer and code protection features improve system cost, power and reliability. The SLEEP (power-down) feature provides a power-saving mode. The user can wake-up the chip from SLEEP through several external and internal interrupts and resets. A highly reliable Watchdog Timer with its own on-chip RC oscillator provides protection against software lock-up. A UV erasable windowed package version is ideal for code development, while the cost-effective One-TimeProgrammable (OTP) version is suitable for production in any volume. The customer can take full advantage of Microchip’s price leadership in OTP microcontrollers, while benefiting from the OTP’s flexibility.
- Four-channel, 8-bit A/D converter
- 8-bit real time clock/counter (TMR0) with 8-bit programmable prescaler
- 1,000,000 erase/write cycle EEPROM data memory
- EEPROM data retention > 40 years Special Microcontroller Features:
- In-Circuit Serial Programming (ICSP™)
- Internal 4 MHz oscillator with programmable calibration
- Selectable clockout
- Power-on Reset (POR)
- Power-up Timer (PWRT) and Oscillator Start-up Timer (OST)
- Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable operation
- Programmable code protection
- Power saving SLEEP mode
- Interrupt-on-pin change (GP0, GP1, GP3)
- Internal pull-ups on I/O pins (GP0, GP1, GP3)
- Internal pull-up on MCLR pin
- Selectable oscillator options:
- INTRC: Precision internal 4 MHz oscillator
- EXTRC: External low-cost RC oscillator
- XT: Standard crystal/resonator
- HS: High speed crystal/resonator
- LP: Power saving, low frequency crystal
