NXP Semiconductors PCA9629 Fm+ I2C 总线步进电机控制器
恩智浦 PCA9629 Fm+ I2C 总线步进电机控制器2C 总线控制低功耗 CMOS 设备，具备驱动四相步进电机所需全部逻辑和控制。PCA9629 配合外部高电流驱动器使用以驱动电机线圈。支持三种步进电机驱动：单相（波驱动）、两相和半步进。此外，当用作输入时，四个通用输入/输出(GPIO)可以感应来自光中断器模块的逻辑电平输出并在 PCA9629 的 INT 引脚上生成低电平有效的中断信号。在感应电机轴原始位置或步进参考脉冲时，此功能很有用。一旦中断，可对 PCA9629 进行编程以自动停止电机或反转电机的旋转方向。
特性
- Generate motor coil drive phase sequence signals with four outputs for use with external high current drivers to off-load CPU
- Four balanced push-pull type outputs capable of sinking 25mA or sourcing 25mA for glueless connection to external high current drivers needed to drive motor coils
- Up to 1000pF loads with 100ns rise and fall times
- Built-in oscillator requires no external components
- Stepper motor drive control logic
- One-phase (wave drive), two-phase, and half-step drive format logic level outputs
- Programmable step rate: 344.8kpps to 0.3pps with ±5% accuracy
- Programmable ramp-up on start and ramp-down to stop
- Programmable steps and rotation control
- Sensor enabled drive control: linked to interrupt from I/O pins
- Direction control of motor shaft
- Selectable active hold, power off or released states for motor shaft
- Four general purpose I/Os:
- Configured to sense logic level outputs from optical interrupter photo transistor circuit
- Configured as outputs to drive (source/sink) LEDs or other loads up to 25mA
- Programmable interrupt Mask Control for input pins
- 1MHz Fast-mode Plus (Fm+) I2C-bus serial interface with 30mA high drive capability on SDA output for driving high capacitive buses
- Compliant with I2C-bus Standard-mode (100 kHz) and Fast-mode (400 kHz) speeds
- Active LOW open-drain interrupt output
- Active LOW reset (RESET) input pin resets device to power-up default state: can be used to recover from bus stuck condition
- Programmable watchdog timer
- All Call address allows programming of more than one device at the same time with the same parameters
- 16 programmable slave addresses using two address pins
- -40° C to +85° C operation
- ESD protection exceeds 2000V HBM per JESD22-A114 and 1000V CDM per JESD22C101
- Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100mA
