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PCA9552BS Datasheet(PDF) 9 Page - NXP Semiconductors |
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PCA9552BS Datasheet(HTML) 9 Page - NXP Semiconductors |
9 / 21 page Philips Semiconductors Product data sheet PCA9552 16-bit I2C LED driver with programmable blink rates 2004 Oct 01 9 Bus transactions A1 A0 12 SCL WRITE TO REGISTER DATA OUT FROM PORT 3 4 567 8 SDA S0 A A A 11 0 0 A2 DATA 1 slave address data to register start condition R/W acknowledge from slave acknowledge from slave acknowledge from slave tpv DATA 1 VALID SW02000 9 B0 00 0 AI B3 B2 B1 command byte Figure 10. WRITE to register 0 0 A2 A1 A0 1 1 0 0 A0 1 1 S0 A A A acknowledge from slave R/W acknowledge from slave A P NA acknowledge from slave acknowledge from master S DATA DATA R/W first byte at this moment master-transmitter becomes master-receiver and slave-receiver becomes slave-transmitter last byte SW01099 no acknowledge from master 1 slave address data from register data from register slave address auto-increment register address if AI = 1 A1 A2 AI B3 B0 0 0 B1 B2 0 Figure 11. READ from register 11 0 0 A2 A1 A0 READ FROM PORT DATA INTO PORT SDA S1 A A DATA 1 DATA 4 slave address data from port data from port start condition R/W acknowledge from slave acknowledge from master stop condition tps DATA 4 DATA 2 P DATA 3 tph SW01096 no acknowledge from master NA DATA 1 NOTE: 1. This figure assumes the command byte has previously been programmed with 00h. Figure 12. READ input port register |
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