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PCA9552 Datasheet(PDF) 7 Page - NXP Semiconductors |
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PCA9552 Datasheet(HTML) 7 Page - NXP Semiconductors |
7 / 28 page PCA9552_5 © Koninklijke Philips Electronics N.V. 2006. All rights reserved. Product data sheet Rev. 05 — 9 March 2006 7 of 28 Philips Semiconductors PCA9552 16-bit I2C-bus LED driver with programmable blink rates 6.3.3 PCS0 - Frequency Prescaler 0 PSC0 is used to program the period of the PWM output. The period of BLINK0 = (PSC0 + 1) / 44. 6.3.4 PWM0 - Pulse Width Modulation 0 The PWM0 register determines the duty cycle of BLINK0. The outputs are LOW (LED off) when the count is less than the value in PWM0 and HIGH when it is greater. If PWM0 is programmed with 00h, then the PWM0 output is always LOW. The duty cycle of BLINK0 = (256 − PWM0) / 256. 6.3.5 PCS1 - Frequency Prescaler 1 PSC1 is used to program the period of the PWM output. The period of BLINK1 = (PSC1 + 1) / 44. 6.3.6 PWM1 - Pulse Width Modulation 1 The PWM1 register determines the duty cycle of BLINK1. The outputs are LOW (LED off) when the count is less than the value in PWM1 and HIGH when it is greater. If PWM1 is programmed with 00h, then the PWM1 output is always LOW. The duty cycle of BLINK1 = (256 − PWM1) / 256. Table 6: PSC0 - Frequency Prescaler 0 register description Bit 7 6 5 4 3 2 1 0 Symbol PSC0[7] PSC0[6] PSC0[5] PSC0[4] PSC0[3] PSC0[2] PSC0[1] PSC0[0] Default 11111111 Table 7: PWM0 - Pulse Width Modulation 0 register description Bit 7 6 5 4 3 2 1 0 Symbol PWM0 [7] PWM0 [6] PWM0 [5] PWM0 [4] PWM0 [3] PWM0 [2] PWM0 [1] PWM0 [0] Default 10000000 Table 8: PSC1 - Frequency Prescaler 1 register description Bit 7 6 5 4 3 2 1 0 Symbol PSC1[7] PSC1[6] PSC1[5] PSC1[4] PSC1[3] PSC1[2] PSC1[1] PSC1[0] Default 11111111 Table 9: PWM1 - Pulse Width Modulation 1 register description Bit 7 6 5 4 3 2 1 0 Symbol PWM1 [7] PWM1 [6] PWM1 [5] PWM1 [4] PWM1 [3] PWM1 [2] PWM1 [1] PWM1 [0] Default 10000000 |
Similar Part No. - PCA9552_06 |
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Similar Description - PCA9552_06 |
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