CJC6811A

CJC6811A is a Cortex based MCU, designed for USB headphone appliances. It integrates one 32-bit RISC CPU with 16KB SRAM, USB, UART, IIC, audio codec, GPIO, TIMER, WDT, PWM, SPI, IIS, SARADC, PLL, LDO etc. CJC6811A can boot from external flash through SPI interface. After powered on, the program is read from external flash into internal SRAM for execution. CJC6811A can run up to 48MHz, and it is designed with special care to minimize the power consumption while allowing for the flexibility to reach for high performance. It includes the clock gating for individual IP, and CJC6811A can be further operated under different power-saving modes: Normal, Idle, Standby, Power-down, different mode have different clock and power strategy.

Key features

• Cortex Like
• Built-in LDO for wide operating voltage range: 3.3V/1.8V
• Support program memory up to 16KB
• RAM: 16KB SRAM
• In-system programming & In-Circuit programming by USB/UART
• Programmable system clock source
• 4 - 6MHz internal RC-oscillator (1% accuracy at 25 ℃)
• 12MHz clock From USB oscillator
• Support external crystal oscillator
• 10 kHz internal low-power RC-oscillator for watchdog and idle wake-up
• USB Spec.V2.0 full speed mode compatible
• USB Audio Class V1.0/V2.0 compatible
• USB Human Interface Device V1.1 compatible
• Support USB suspend/resume/reset function
• Support control, interrupt, bulk and isochronous data transfer
• Default sample rate: 192K/176.4K/96K/88.2K/48K/44.1K
• Support bit length: 16/20/24bit
• DAC support max to 192K/16bit ADC max to 48K/16bi
• Up to 8 general purpose I/O (GPIO)
• 3 internal timers
• Internal or external clock source selection
• Interrupt can be issued upon overflow and time-up
• Each timer has two match registers
• Supports the incrementing and decrementing models
• During the timeout, the outputs are one or a combination of the following signals: System reset, System interrupt, External interrupt
• 32-bit down counter
• Internal or external clock source selection
• A variable time-out period of reset
• Access protection
• One 16-bit timers PWM channel
• Programmable duty control of output waveform
• Auto reload mode or one-shot pulse mode
• Capture and compare function
• Programmable baud rates, Baud rate up to 921.6K
• One specified SPI interface as AHB device for boot loader and APB device for write back
• Speed up to 40MHz
• Compatible with Philips IIC standard
• Support I2S interface
• Support master mode and 16/24/32bit data width
• 1 channel analog input
• Programmable 3 threshold levels: 2.7V/2.4V/2.0V (default 2.0V)
• Optional BOD interrupt or reset
• Operating temperature: -40 - +85 Degree
• Storage temperature: -55 - +125 Degree
• Package: QFN5*5 - 32
• Moisture sensitivity level MSL3