PCA9551 Philips Semiconductors, PCA9551 Datasheet
PCA9551
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PCA9551 Summary of contents
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... PCA9551 2 8-bit I C LED driver with programmable blink rates Product data sheet Supersedes data of 2003 May 05 Philips Semiconductors INTEGRATED CIRCUITS 2004 Oct 01 ...
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... LED on and off. This greatly increases the amount of traffic on 2 the I C-bus and uses up one of the master’s timers. The PCA9551 LED Blinker instead requires only the initial set up command to program BLINK RATE 1 and BLINK RATE 2 (i.e., the frequency and duty cycle) for each individual output. From then on, only one ...
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... Figure 2. Pin configuration — HVQFN Address input 0 Address input 1 Address input 2 LED drivers 0–3 Supply ground SS LED drivers 4–7 Active-LOW reset input Serial clock line Serial data line Supply voltage DD 3 Product data sheet PCA9551 SDA SCL 1 2 RESET ...
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... POWER- RESET RESET OSCILLATOR V SS 2004 Oct 01 A0 PWM0 PRESCALER 0 REGISTER REGISTER PWM1 PRESCALER 1 REGISTER REGISTER NOTE: ONLY ONE I/O SHOWN FOR CLARITY Figure 3. Block diagram 4 Product data sheet PCA9551 INPUT REGISTER LED SELECT (LSx) REGISTER 0 1 LEDx BLINK0 BLINK1 SW01015 ...
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... The last bit of the address byte defines the operation to be performed. When set to logic 1 a read is selected while a logic 0 selects a write operation. CONTROL REGISTER Following the successful acknowledgement of the slave address, the bus master will send a byte to the PCA9551 which will be stored in the Control Register ...
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... The output can be pulse-width controlled when PWM0 or PWM1 are used. POWER-ON RESET When power is applied to V the PCA9551 in a reset condition until V this point, the reset condition is released and the PCA9551 registers are initialized to their default states, all the outputs in the off state Thereafter, V must be lowered below 0 ...
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... Figure 8). SW00363 Figure 7. Definition of start and stop conditions SLAVE MASTER TRANSMITTER/ TRANSMITTER RECEIVER Figure 8. System configuration 7 Product data sheet PCA9551 SDA SCL P STOP condition SW00365 MASTER TRANSMITTER/ MULTIPLEXER ...
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... In this event, the transmitter must leave the data line HIGH to enable the master to generate a stop condition. DATA OUTPUT BY TRANSMITTER DATA OUTPUT BY RECEIVER SCL FROM MASTER S START condition 2004 Oct 01 not acknowledge acknowledge Figure 9. Acknowledgement on the I C-bus 8 Product data sheet PCA9551 9 clock pulse for acknowledgement SW00368 ...
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... A1 A0 DATA R/W acknowledge from slave DATA 2 DATA Figure 12. READ input port register 9 Product data sheet PCA9551 data to register DATA 1 A acknowledge from slave DATA 1 VALID t pv SW01081 acknowledge acknowledge from slave from master data from register 1 DATA ...
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... above V and prevents additional supply current consumption when SW02086 Figure 15. Device supplied by a lower voltage 10 Product data sheet PCA9551 5 V GPIO SW00899 becomes lower than V and less than the LED supply DD 3 LED ...
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... The following example will show how to set LED0 to LED3 on. It will then set LED4 and LED5 to blink 50% duty cycle. LED6 and LED7 will be set to blink and at a 25% duty cycle. Table 1. Start PCA9551 address with A0–A2 = LOW PSC0 subaddress + auto-increment Set prescaler PSC0 to achieve a period of 1 second: PSC0 1 ...
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... V; Note 0 5.0 V; Note 3 – — –0.5 2.0 2.0 – — Product data sheet PCA9551 MIN MAX UNIT –0.5 6 – 0.5 5 — — 100 mA — 400 mW –65 +150 C –40 +85 C TYP MAX UNIT — ...
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... RC time constant of the SDA bus. RESET 13 Product data sheet PCA9551 FAST MODE 2 I C-BUS UNITS MIN MAX 100 0 400 kHz — 1.3 — s — 0.6 — s — 0.6 — ...
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... MIN –40 Figure 17. Typical frequency variation over process at V 2004 Oct 01 0 +25 +70 TEMPERATURE ( +25 +70 TEMPERATURE ( Product data sheet PCA9551 +20% +10% 0% PERCENT VARIATION –10% –20% –30% –40% +85 SW02311 +20% +10% 0% PERCENT VARIATION –10% –20% –30% –40% ...
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... Figure 19. Definition of timing BIT 6 BIT 7 (A6) (D1) t HIGH SCL SU;DAT HD;DAT VD;DAT C-bus timing diagram; rise and fall times refer Product data sheet PCA9551 ACK OR READ CYCLE t RESET 50% 50 RESET 50% LED OFF SW02310 t t HD;STA ...
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... Load capacitance includes jig and probe capacitance Termination resistance should be equal to the output T impedance Z 2004 Oct 500 D.U. FOR SDA AND SCL > the pulse generators. O Figure 21. Test circuitry for switching times 16 Product data sheet PCA9551 V DD Open SW02334 ...
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... Philips Semiconductors 2 8-bit I C LED driver with programmable blink rates SO16: plastic small outline package; 16 leads; body width 3.9 mm 2004 Oct 01 17 Product data sheet PCA9551 SOT109-1 ...
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... Philips Semiconductors 2 8-bit I C LED driver with programmable blink rates TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm 2004 Oct 01 18 Product data sheet PCA9551 SOT403-1 ...
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... Philips Semiconductors 2 8-bit I C LED driver with programmable blink rates HVQFN16: plastic thermal enhanced very thin quad flat package; no leads; 16 terminals; body 0.85 mm 2004 Oct 01 19 Product data sheet PCA9551 SOT629-1 ...
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... Product data (9397 750 11155); ECN 853-2343 29331 of 20 December 2002; supersedes data of 2002 Sep 09 (9397 750 10328). _2 20020927 Product data (9397 750 10328); ECN 853-2343 28878 of 09 September 2002. 2004 Oct active connection is used.” POR 20 Product data sheet PCA9551 ...
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... Relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). Fax: + 24825 Document number: 21 Product data sheet PCA9551 2 C patent Koninklijke Philips Electronics N.V. 2004 All rights reserved. Printed in U.S.A. Date of release: 10-04 ...