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PCA9635 Datasheet(PDF) 11 Page - NXP Semiconductors |
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PCA9635 Datasheet(HTML) 11 Page - NXP Semiconductors |
11 / 35 page PCA9635_7 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 07 — 16 July 2009 11 of 35 NXP Semiconductors PCA9635 16-bit Fm+ I2C-bus LED driver [1] See Section 7.7 “Using the PCA9635 with and without external drivers” for more details. Normal LEDs can be driven directly in either mode. Some newer LEDs include integrated Zener diodes to limit voltage transients, reduce EMI and protect the LEDs, and these must be driven only in the open-drain mode to prevent overheating the IC. [2] Change of the outputs at the STOP command allows synchronizing outputs of more than one PCA9635. Applicable to registers from 02h (PWM0) to 17h (LEDOUT) only. [3] See Section 7.4 “Active LOW output enable input” for more details. 7.3.3 PWM0 to PWM15, individual brightness control A 97 kHz fixed frequency signal is used for each output. Duty cycle is controlled through 256 linear steps from 00h (0 % duty cycle = LED output off) to FFh (99.6 % duty cycle = LED output at maximum brightness). Applicable to LED outputs programmed with LDRx = 10 or 11 (LEDOUT0 to LEDOUT3 registers). (1) 1 to 0 OUTNE[1:0][3] R/W 00 When OE = 1 (output drivers not enabled), LEDn = 0. 01* When OE = 1 (output drivers not enabled): LEDn = 1 when OUTDRV = 1 LEDn = high-impedance when OUTDRV = 0 (same as OUTNE[1:0] = 10) 10 When OE = 1 (output drivers not enabled), LEDn = high-impedance. 11 reserved Table 6. MODE2 - Mode register 2 (address 01h) bit description …continued Legend: * default value. Bit Symbol Access Value Description Table 7. PWM0 to PWM15 - PWM registers 0 to 15 (address 02h to 11h) bit description Legend: * default value. Address Register Bit Symbol Access Value Description 02h PWM0 7:0 IDC0[7:0] R/W 0000 0000* PWM0 Individual Duty Cycle 03h PWM1 7:0 IDC1[7:0] R/W 0000 0000* PWM1 Individual Duty Cycle 04h PWM2 7:0 IDC2[7:0] R/W 0000 0000* PWM2 Individual Duty Cycle 05h PWM3 7:0 IDC3[7:0] R/W 0000 0000* PWM3 Individual Duty Cycle 06h PWM4 7:0 IDC4[7:0] R/W 0000 0000* PWM4 Individual Duty Cycle 07h PWM5 7:0 IDC5[7:0] R/W 0000 0000* PWM5 Individual Duty Cycle 08h PWM6 7:0 IDC6[7:0] R/W 0000 0000* PWM6 Individual Duty Cycle 09h PWM7 7:0 IDC7[7:0] R/W 0000 0000* PWM7 Individual Duty Cycle 0Ah PWM8 7:0 IDC8[7:0] R/W 0000 0000* PWM8 Individual Duty Cycle 0Bh PWM9 7:0 IDC9[7:0] R/W 0000 0000* PWM9 Individual Duty Cycle 0Ch PWM10 7:0 IDC10[7:0] R/W 0000 0000* PWM10 Individual Duty Cycle 0Dh PWM11 7:0 IDC11[7:0] R/W 0000 0000* PWM11 Individual Duty Cycle 0Eh PWM12 7:0 IDC12[7:0] R/W 0000 0000* PWM12 Individual Duty Cycle 0Fh PWM13 7:0 IDC13[7:0] R/W 0000 0000* PWM13 Individual Duty Cycle 10h PWM14 7:0 IDC14[7:0] R/W 0000 0000* PWM14 Individual Duty Cycle 11h PWM15 7:0 IDC15[7:0] R/W 0000 0000* PWM15 Individual Duty Cycle duty cycle IDCx 7:0 [] 256 --------------------------- = |
Similar Part No. - PCA9635_09 |
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Similar Description - PCA9635_09 |
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