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PCA9625D Datasheet(PDF) 9 Page - NXP Semiconductors |
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PCA9625D Datasheet(HTML) 9 Page - NXP Semiconductors |
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9 / 33 page  PCA9625_2 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 02 — 15 January 2008 9 of 33 NXP Semiconductors PCA9625 16-bit Fm+ I2C-bus 100 mA 24 V LED driver AI[2:0] = 000 is used when the same register must be accessed several times during a single I2C-bus communication, for example, changes the brightness of a single LED. Data is overwritten each time the register is accessed during a write operation. AI[2:0] = 100 is used when all the registers must be sequentially accessed, for example, power-up programming. AI[2:0] = 101 is used when the 16 LED drivers must be individually programmed with different values during the same I2C-bus communication, for example, changing color setting to another color setting. AI[2:0] = 110 is used when the LED drivers must be globally programmed with different settings during the same I2C-bus communication, for example, global brightness or blinking change. AI[2:0] = 111 is used when individual and global changes must be performed during the same I2C-bus communication, for example, changing a color and global brightness at the same time. Only the 5 least significant bits D[4:0] are affected by the AI[2:0] bits. When the Control register is written, the register entry point determined by D[4:0] is the first register that will be addressed (read or write operation), and can be anywhere between 0 0000 and 1 1011 (as defined in Table 4). When AI[2] = 1, the Auto-Increment flag is set and the rollover value at which the register increment stops and goes to the next one is determined by AI[2:0]. See Table 3 for rollover values. For example, if the Control register = 1111 0100 (F4h), then the register addressing sequence will be (in hex): 14 → … → 1B → 00 → … → 13 → 02 → … → 13 → 02 → … → 13 → 02 → … as long as the master keeps sending or reading data. 7.3 Register definitions Table 4. Register summary[1][2] Register number (hex) D4 D3 D2 D1 D0 Name Type Function 00 00000 MODE1 read/write Mode register 1 01 00001 MODE2 read/write Mode register 2 02 00010 PWM0 read/write brightness control LED0 03 00011 PWM1 read/write brightness control LED1 04 00100 PWM2 read/write brightness control LED2 05 00101 PWM3 read/write brightness control LED3 06 00110 PWM4 read/write brightness control LED4 07 00111 PWM5 read/write brightness control LED5 08 01000 PWM6 read/write brightness control LED6 09 01001 PWM7 read/write brightness control LED7 0A 01010 PWM8 read/write brightness control LED8 0B 01011 PWM9 read/write brightness control LED9 0C 01100 PWM10 read/write brightness control LED10 0D 01101 PWM11 read/write brightness control LED11 0E 01110 PWM12 read/write brightness control LED12 |
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