Описание
Microchip | SMART SAM L22 is a series of Ultra low-power segment LCD microcontrollers using the 32-bit ARM Cortex -M0+ processor, ranging from 48- to 100-pins with up to 256KB Flash and 32KB of SRAM and can drive up to 320 LCD segments. The SAM L22 devices operate at a maximum frequency of 32MH–and reach 2.46 Coremark/MHz. They are designed for simple and intuitive migration with identical peripheral modules, hex compatible code, identical linear address map and pin compatible migration paths between all devices in the product series. All devices include intelligent and flexible peripherals, Microchip Event System for inter-peripheral signaling, and support for capacitive touch button, slider and wheel user interfaces. The Microchip SAM L22 devices provide the following features: Segment LCD (SLCD) controller with up to 48 selectable SLCD pins from max. 52 pins to drive up to 320 segments, all SLCD Pins can be used also as GPIOs (100-pin package: 8 of the SLCD pins can be used only as GP input), in-system programmable Flash, sixteen-channel direct memory access (DMA) controller, 8 channel Event System, programmable interrupt controller, up to 82 programmable I/O pins, 32-bit real-time clock and calendar, up to four 16-bit Timer/Counters (TC) and one 24-bit Timer/Counters for Control (TCC), where each TC can be configured to perform frequency and waveform generation, accurate program execution timing or input capture with time and frequency measurement of digital signals. The TCs can operate in 8- or 16-bit mode, selected TCs can be cascaded to form a 32-bit TC, and the TCC has extended functions optimized for motor, lighting and other control applications. The series provide one full-speed USB 2.0 device interface; up to six Serial Communication Modules (SERCOM) that each can be configured to act as an USART, UART, SPI, I2C up to 3.4MHz, SMBus, PMBus, and ISO7816 smart card interface; up to twenty channel 1Msps 12-bit ADC with optional oversampling and decimation supporting up to 16-bit resolution, two analog comparators with window mode.
- Processor
- ARM Cortex-M0+ CPU running at up to 32MHz
- Single-cycle hardware multiplier
- Micro Trace Buffer
- Memory Protection Unit (MPU)
- Memories
- 64/128/256KB in-system self-programmable Flash
- 2/4/8KB Flash Read-While-Write section
- 8/16/32KB SRAM Main Memory
- System
- Power-on reset (POR) and programmable brown-out detection (BOD)
- Internal and external clock options
- External Interrupt Controller (EIC)
- 16 external interrupts that can use any I/O-Pin
- One non-maskable interrupt on one I/O-Pin
- Two-pin Serial Wire Debug (SWD)
- Low Power
- Idle, Standby, Backup, and Off sleep modes
- SleepWalking peripherals
- Battery backup support
- Two runtime selectable power/performance levels
- Embedded Buck/LDO regulator supporting on-the-fly selection
- Active mode: <50µA/MHz
- Standby with full retention, RTC and LCD = 3.47µA
- 2.1µs wake-up time
- Standby with full retention and RTC: 1.87µA
- 2.1µs wake-up time
- Ultra low power Backup mode with RTC: 490nA
- 90µs wake-up time
- Peripherals
- Segment LCD controller
- Up to 8 (4) common and 40 (44) segment terminals to drive 320 (176) segments
- Static, ½, 1/3, ¼ bias
- Internal charge pump able to generate VLCD higher than VDDIO
- 16-channel Direct Memory Access Controller (DMAC)
- 8-channel Event System
- Up to four 16-bit Timer/Counters (TC), each configurable as:
- 16-bit TC with two compare/capture channels
- 8-bit TC with two compare/capture channels
- 32-bit TC with two compare/capture channels, by using two TCs
- One 24-bit Timer/Counters for Control (TCC), with extended functions:
- Four compare channels with optional complementary output
- Generation of synchronized pulse width modulation (PWM) pattern across port pins
- Deterministic fault protection, fast decay and configurable dead-time between complementary output
- Dithering that increase resolution with up to 5 bit and reduce quantization error
- Frequency Meter
