Data Sheet

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PCA9685 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 3 — 2 September 2010 19 of 51 NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I
2
C-bus LED controller
Example 1: LEDn_ON unchanged and LEDn_OFF decreased, but delay still > LEDn_OFF
Example 2: LEDn_ON changed and LEDn_OFF changed, but delay still > LEDn_OFF
Example 3: LEDn_ON unchanged and LEDn_OFF increased where LEDn_ON < LEDn_OFF
Example 4: LEDn_ON[12] = 1 and LEDn_OFF[12] changed from 0 to 1
Fig 11. Update examples when LEDn_ON > LEDn_OFF
0
STOP
example 1
LEDn_ON
LEDn_OFF
4095 0
3071
1023
4095
0
511
4095
0
LEDn_ON
LEDn_OFF
example 2
3413
002aad19
5
LEDn_ON
example 3
LEDn_ON
LEDn_OFF
example 4
off
register(s) updated in this cycle
3071
1023
3071
LEDn_OFF
on
1023
output(s) updated in this cycle
3071
4095 0
511
3413
511
3071
3071
3413
3413