Описание
The ZLF645 series of flash MCUs are members of the Crimzon family of infrared microcontrollers. This series provides a directly compatible code upgrade path to other Crimzon MCUs, offers a robust learning function, and features up to 64KB flash memory and 1K general-purpose RAM. Two timers allow the generation of complex signals while performing other counting operations. A universal asynchronous receiver-transmitter (UART) allows the ZLF645 MCU to function as a slave/master database chip. When the UART is not in use, the baud-rate generator (BRG) can be used as a third timer. Enhanced stop-mode recovery (SMR) features allow the ZLF645 MCU to recover from stop mode on any change of logic and on any combination of the 12 SMR inputs. The SMR source can also be used as an interrupt source. Many high-end remote control units offer a learning function. A learning function allows a replacement remote unit to learn infrared signals from the original remote unit and regenerate the signal. However, the amplifying circuits of many learning remotes are expensive and are not tuned well. The ZLF645 MCU is the first chip to offer a built-in tuned amplification circuit in a wide range of positions and battery voltages. The only external component required is a photodiode. The ZLF645 MCU greatly reduces the system cost and improves learning function reliability. With all new features, the ZLF645 MCU is excellent for infrared remote control and other MCU applications.
- IR learning amplifier
- Low power consumption 11 mW (typical)
- Three standby modes:
- STOP 1.7 µA (typical)
- HALT 0.6 mA (typical)
- Low-voltage reset
- Intelligent counter/timer architecture to automate generation or reception anddemodulation of complex waveform, and pulsed signals:
- One programmable 8-bit counter/timer with two capture registers and twoload registers
- One programmable 16-bit counter/timer with one 16-bit capture register pairand one 16-bit load register pair
- Programmable input glitch filter for pulse reception
- The UART baud rate generator can be used as another 8-bit timer, when theUART is not in use
- Six priority interrupts:
- Three external/UART interrupts
- Two assigned to counter/timers
- One low-voltage detection interrupt
- 8-bit UART:
- RX and TX interrupts
- 4800, 9600, 19200, and 38400 baud rates
- Parity Odd/Even/None
- Stop bits 1/2
- ICP (In-circuit Flash Programming) interface multiplexed with one of the GPIO’s
- Intelligent Power-On Reset (POR) to provide reduced POR time on detectionof stable clock from external crystal oscillator or resonator
- Low-voltage and high-voltage detection flags
- Programmable Watchdog Timer (WDT)/POR circuits
- Two on-board analog comparators with independent reference voltages andprogrammable interrupt polarity
- User-selectable options through option bit Flash coding (ON/OFF):
- Port 0 pins 0
- 3 pull-up transistors
- Port 0 pins 4
- 7 pull-up transistors
- Port 1 pins 0
- 3 pull-up transistors
- Port 1 pins 4
- 7 pull-up transistors
- Port 2 pins 0
- 7 pull-up transistors
- Port 3 pins 0
- 3 pull-up transistors
- Port 4 pins 0
- 7 pull-up transistors
- WDT enabled at Power-On Reset
- Flash lowest half main memory protect
- Flash entire main memory protect
- 16-bit addressability for stack pointer
- No division, divide by 2, divide by 16, or divide by 32 of external clock to systemclock
