Description
The PIC16C745/765 devices are low cost, high-performance, CMOS, fully-static, 8-bit microcontrollers in the PIC16CXX mid-range family. All PICmicro microcontrollers employ an advanced RISC architecture. The PIC16C745/765 microcontroller family has 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. The PIC16C745 device has 22 I/O pins. The PIC16C765 device has 33 I/O pins. Each device has 256 bytes of RAM. In addition, several peripheral features are available including: three timer/counters, two Capture/Compare/PWM modules and two serial ports. The Universal Serial Bus (USB 1.1) low speed peripheral provides bus communications. The Universal Synchronous Asynchronous Receiver Transmitter (USART) is also known as the Serial Communications Interface or SCI. Also, a 5-channel high-speed 8-bit A/D is provided on the PIC16C745, while the PIC16C765 offers 8 channels. The 8-bit resolution is ideally suited for applications requiring a low cost analog interface (e.g., thermostat control, pressure sensing, etc.). The PIC16C745/765 devices have special features to reduce external components, thus reducing cost, enhancing system reliability and reducing power consumption. There are 4 oscillator options, of which EC is for the external regulated clock source, E4 is for the external regulated clock source with the PLL enabled, HS is for the high speed crystals/resonators and H4 is for high speed crystals/resonators with the PLL enabled. 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 (WDT), with a dedicated on-chip RC oscillator, provides protection against software lock-up, and also provides one way of waking the device from SLEEP. A UV erasable CERDIP packaged version is ideal for code development, while the cost-effective One-TimeProgrammable (OTP) version is suitable for production in any volume. The PIC16C745/765 devices fit nicely in many applications ranging from security and remote sensors to appliance controls and automotives. The EPROM technology makes customization of application programs (data loggers, industrial controls, UPS) extremely fast and convenient. The small footprint packages make this microcontroller series perfect for all applications with space limitations. Low-cost, lowpower, high-performance, ease of use and I/O flexibility make the PIC16C745/765 devices very versatile, even in areas where no microcontroller use has been considered before (e.g., timer functions, serial communication, capture and compare, PWM functions and coprocessor applications).
- Microcontroller Core Features:
- High-performance RISC CPU
- Only 35 single word instructions
- All single cycle instructions except for program branches which are two cycle
- Interrupt capability (up to 12 internal/external interrupt sources)
- Eight level deep hardware stack
- Direct, indirect and relative addressing modes
- 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
- Brown-out detection circuitry for Brown-out Reset (BOR)
- Programmable code-protection
- Power saving SLEEP mode
- Selectable oscillator options
- EC – External clock (24 MHz)
- E4 – External clock with PLL (6 MHz)
- HS – Crystal/Resonator (24 MHz)
- H4 – Crystal/Resonator with PLL (6 MHz)
- Processor clock of 24 MHz derived from 6 MHz crystal or resonator
- Fully static low-power, high-speed CMOS
- In-Circuit Serial Programming (ICSP)
- Operating voltage range
- 4.35 to 5.25V
- High Sink/Source Current 25/25 mA
- Wide temperature range
- Industrial (-40°C – 85°C)
- Low-power consumption:
- ~ 16 mA @ 5V, 24 MHz
- 100 µA typical standby current
- Peripheral Features:
- Universal Serial Bus (USB 1.1)
- Soft attach/detach
- 64 bytes of USB dual port RAM
- 22 (PIC16C745) or 33 (PIC16C765) I/O pins
- Individual direction control
- 1 high voltage open drain (RA4)
- 8 PORTB pins with:
- Interrupt-on-change control (RB<7:4> only)
- Weak pull-up control
- 3 pins dedicated to USB
- Timer0: 8-bit timer/counter with 8-bit prescaler
- Timer1: 16-bit timer/counter with prescaler can be incremented during SLEEP via external crystal/clock
- Timer2: 8-bit timer/counter with 8-bit period register, prescaler and postscaler
- 2 Capture, Compare and PWM modules
- Capture is 16-bit, max. resolution is 10.4 ns
- Compare is 16-bit, max. resolution is 167 ns
- PWM maximum resolution is 10-bit
- 8-bit multi-channel Analog-to-Digital converter
- Universal Synchronous Asynchronous Receiver Transmitter (USART/SCI)
- Parallel Slave Port (PSP) 8-bits wide, with external RD, WR and CS controls (PIC16C765 only)
