Описание
The K21 product family members are optimized for cost-sensitive applications requiring low-power, USB connectivity, processing efficiency with floating point unit and the need for extensive tamper protection, such as Electronic Point of Sales. It shares the comprehensive enablement and scalability of the Kinetis family.
- Performance
- Up to 120 MHz ARM Cortex-M4-based core with DSP instructions delivering 1.25 Dhrystone MIPS per MHz Memories and memory interfaces
- Up to 1 MB program flash memory and 128 KB RAM
- Up to 128 KB FlexNVM and 4 KB FlexRAM on FlexMemory devices
- FlexBus external bus interface
- System peripherals
- Multiple low-power modes; low leakage wakeup unit
- Memory protection unit with multi-master protection
- 16-channel DMA controller
- External watchdog monitor and software watchdog
- Security and integrity modules
- Hardware CRC module
- Tamper detect and secure storage
- Hardware random-number generator
- Hardware encryption
- 128-bit unique identification (ID) number per chip
- Analog modules
- Two 16-bit SAR ADCs
- Two 12-bit DACs
- Communication interfaces
- USB full-/low-speed On-the-Go controller
- USB Device Charger detect
- Controller Area Network (CAN) module
- Three SPI modules
- Three I2C modules
- Six UART modules
- Secure Digital host controller (SDHC)
- I2S module
- Timers
- Two 8-channel Flex-Timers (PWM/Motor Control)
- Two 2-channel Flex-Timers (PWM/Quad Decoder)
- Periodic interrupt timers and 16-bit low-power timer
- Carrier modulator transmitter
- Real-time clock
- Programmable delay block
- Clocks
- 3 to 32 MHz and 32 kHz crystal oscillator
- PLL, FLL, and multiple internal oscillators
- Operating Characteristics
- Voltage range: 1.71 to 3.6 V
- Flash write voltage range: 1.71 to 3.6 V
- Temperature range (ambient): –40 to 105°C
- Three analog comparators (CMP)
- Voltage reference
