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EU6864L
Description
The high-performance motor drive chip incorporates ME core and 8051 core. ME core integrates FOC,
MDU, LPF, PID and SVPWM modules that allow for automatic calculation of FOC or square-wave control
by the hardware for sensored/sensorless BLDC/PMSM motors. 8051 core is used for parameter configuration
and routine processing. Most of 8051 core instruction cycle takes 1T or 2T clock cycle(s). The dual cores
work in parallel to achieve high-performance motor control. The chip integrates high-speed operational
amplifiers, comparators, PWM (EU6815L), pre-driver (EU6865Q/EU6864Q/EU6864L), high-speed ADC,
CRC, SPI, I2C, UART, Timers and built-in high-voltage LDO, which are suitable for FOC or square-wave
based BLDC/PMSM motors.
The above are the general descriptions on the product family. The features vary by models. For details,
see sections 2 Pin Definitions and 4 Ordering Information.
For concise description and easy differentiation, if it is specified that a feature is applied to a specific
model, the feature is exclusive to this model. For example, EU6864 refers to all models of EU6864. Otherwise,
the feature is a common feature of the product family.
EU6815 includes EU6815L (LQFP48).
EU6865 includes EU6865Q (QFN56).
EU6864 includes EU6864Q (QFN48-38) and EU6864L (LQFP52).
Features
◼ Power supply of EU6815L/EU6865Q:
➢ High-voltage single-power supply mode: When VCC_MODE = 0, external power supply
5V~28V is connected to VCC pin, and internal LDO supplies VDD5 voltage.
➢ Low-voltage single-power supply mode: When VCC_MODE = 1, external power supply
3V~5.5V is connected to VDD5 pin, and VDD5 pin is shorted to VCC pin.
➢ Dual-power supply mode: When VCC_MODE = 1, external power supply 1 (5V~36V) is
connected to VCC pin, and external power supply 2 (5V) is connected to VDD5 pin.
Note: VDRV voltage of EU6865Q is supplied by external power supply.
◼ Power supply of EU6864Q/EU6864L:
➢ Single-power supply mode: When VCC_MODE = 0, external power supply 12V~20V is
connected to VCC pin, and internal LDO supplies VDD5 voltage.
◼ Dual core: 8051 core and ME core
◼ An instruction cycle mostly takes 1 or 2 system clock cycle(s)
◼ 32kB Flash ROM with CRC, self-program and code protection
◼ 256 bytes IRAM and 3.75k bytes XRAM
◼ ME: Core integrating PID module, FOC module, MDU auxiliary computing module and LPF module
◼ 16 interrupt sources with 4 configurable priority levels
◼ Number of GPIOs:
➢ EU6815L: 38
➢ EU6865Q: 36
➢ EU6864Q: 22
➢ EU6864L: 24
◼ Timers:
➢ Timer1: Timer supporting square-wave drive timing control, automatic commutation, cycle
by-cycle current limiting and Hall/BEMF-based position sensing
➢ Timer2 (EU6815L/EU6865Q): Timer supporting PWM output, measurement of duty cycle
and period of input PWM wave, measurement of the time of set PWM wave numbers, QEP
decoding, tailwind/headwind detection, and rotation direction and speed detection of step
motor
➢ Timer3/Timer4: Timers supporting PWM output, and measurement of duty cycle and period
of input PWM wave. Timer4 supports FG generation and Timer3 supports up to 48MHz input
➢ Systick Timer
➢ RTC
◼ Communication interfaces:
➢ 1*SPI (EU6815L/EU6865Q)
➢ 1*I2C
➢ 2*UARTs, supporting single-wire mode (EU6815L/EU6865Q)
➢ 1*UART, supporting single-wire mode (EU6864Q/EU6864L)
➢ Dual-channel DMA: supporting data transmission via I2C/SPI/UART (EU6815L/EU6865Q)
➢ Dual-channel DMA: supporting data transmission via I2C/UART (EU6864Q/EU6864L)
◼ Analog peripherals:
➢ 12-bit ADC, operating with 1μs conversion time and internal VREF or external VREF
selectable as reference voltage
➢ Number of ADC channels:
◆ EU6815L/EU6865Q: 14
◆ EU6864Q: 12
◆ EU6864L: 13 (Among them, AD0 is an internal channel)
➢ Internal VREF. 3V, 4V, 4.5V and VDD5 can be selected as the internal reference.
➢ Internal VHALF, with VREF/2, 1/4 VREF, 1/8 VREF or 25/64 VREF as the internal reference
➢ Four standalone operational amplifier(s), where PGA is configurable
➢ Four-channel analog comparator
➢ DAC: Single-channel 9-bit, single-channel 8-bit, single-channel 6-bit
◼ Driver Type
➢ EU6815L: PWM output
➢ EU6865Q/EU6864Q/EU6864L: Built-in MOSFET driver with 6N pre-driver output
◼ FOC module supports single/dual/triple-shunt current sampling
◼ PFC
◼ System clock
➢ Built-in 24MHz high-speed RC oscillator
➢ Built-in 32.8kHz low-speed RC oscillator
➢ External 32768Hz crystal clock (EU6815L/EU6865Q)
◼ WDT
◼ LVD
◼ TSD
◼ Two-wire FICE protocol based in-circuit emulation
Package
LQFP52
Datasheet

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