Register definitions for the PCA9685 I2C PWM controller. More...

Detailed Description

Register definitions for the PCA9685 I2C PWM controller.

Register addresses
#define	PCA9685_REG_MODE1 (0x00)
	Mode1 register.

#define	PCA9685_REG_MODE2 (0x01)
	Mode2 register.

#define	PCA9685_REG_SUBADR1 (0x02)
	I2C bus subaddress 1 register.

#define	PCA9685_REG_SUBADR2 (0x03)
	I2C bus subaddress 2 register.

#define	PCA9685_REG_SUBADR3 (0x04)
	I2C bus subaddress 3 register.

#define	PCA9685_REG_ALLCALLADDR (0x05)
	LED All Call I 2 C-bus address.

#define	PCA9685_REG_LED0_ON_L (0x06)
	LED0 ON control low byte.

#define	PCA9685_REG_ALL_LED_ON_L (0xfa)
	Load all LEDn_OFF register low byte.

#define	PCA9685_REG_ALL_LED_ON_H (0xfb)
	Load all LEDn_OFF register high byte.

#define	PCA9685_REG_ALL_LED_OFF_L (0xfc)
	Load all LEDn_OFF register low byte.

#define	PCA9685_REG_ALL_LED_OFF_H (0xfd)
	Load all LEDn_OFF register high byte.

#define	PCA9685_REG_ALL_LED_ON (0xfa)
	Load all LEDn_OFF register word.

#define	PCA9685_REG_ALL_LED_OFF (0xfc)
	Load all LEDn_OFF register word.

#define	PCA9685_REG_PRE_SCALE (0xfe)
	Prescaler for PWM output frequency.

#define	PCA9685_REG_TEST_MODE (0xff)
	Enter test mode register.

#define	PCA9685_REG_LED_ON(n) (0x06 + (n << 2))
	LEDn ON control word.

#define	PCA9685_REG_LED_OFF(n) (0x08 + (n << 2))
	LEDn OFF control word.

#define	PCA9685_REG_LED_ON_L(n) (0x06 + (n << 2))
	LEDn ON control low byte.

#define	PCA9685_REG_LED_ON_H(n) (0x07 + (n << 2))
	LEDn ON control high byte.

#define	PCA9685_REG_LED_OFF_L(n) (0x08 + (n << 2))
	LEDn OFF control low byte.

#define	PCA9685_REG_LED_OFF_H(n) (0x09 + (n << 2))
	LEDn OFF control high byte.

Register structures
#define	PCA9685_MODE1_RESTART (0x80)
	State of restart logic, write 1 to clear.

#define	PCA9685_MODE1_EXTCLK (0x40)
	Use EXTCLK pin.

#define	PCA9685_MODE1_AI (0x20)
	Enable register auto-increment.

#define	PCA9685_MODE1_SLEEP (0x10)
	Enter low power mode, PWM is off.

#define	PCA9685_MODE1_SUB1 (0x08)
	Enable I2C subaddress 1.

#define	PCA9685_MODE1_SUB2 (0x04)
	Enable I2C subaddress 2.

#define	PCA9685_MODE1_SUB3 (0x02)
	Enable I2C subaddress 3.

#define	PCA9685_MODE1_ALLCALL (0x01)
	Enable I2C all call address.

#define	PCA9685_MODE2_INVERT (0x10)
	Invert outputs.

#define	PCA9685_MODE2_OCH (0x08)
	Output change change configuration.

#define	PCA9685_MODE2_OUTDRV (0x04)
	Output driver configuration.

#define	PCA9685_MODE2_OUTNE (0x03)
	Output enabled configuration.

Register value definitions
#define	PCA9685_LED_ON (0x1000) /* LEDs on word */

#define	PCA9685_LED_OFF (0x1000) /* LEDs off word */

#define	PCA9685_LED_ON_H (0x10) /* LEDs on high byte */

#define	PCA9685_LED_OFF_H (0x10) /* LEDs off high byte */

#define	PCA9685_ALL_LED_ON (0x1000) /* All LEDs on word */

#define	PCA9685_ALL_LED_OFF (0x1000) /* All LEDs off word */

#define	PCA9685_ALL_LED_ON_H (0x10) /* All LEDs on high byte */

#define	PCA9685_ALL_LED_OFF_H (0x10) /* All LEDs off word */

Register addresses