pca9501 NXP Semiconductors, pca9501 Datasheet
pca9501
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pca9501 Summary of contents
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... PCA9501 2 8-bit I C and SMBus I/O port with interrupt, 2-kbit EEPROM and 6 address pins Product data sheet Supersedes data of 2003 Sep 12 Philips Semiconductors INTEGRATED CIRCUITS 2004 Sep 30 ...
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... trademark of Philips Semiconductors Corporation. 2004 Sep 30 DESCRIPTION The PCA9501 is an 8-bit I/O expander with an on-board 2-kbit EEPROM. The I/O expandable eight quasi bidirectional data pins can be independently assigned as inputs or outputs to monitor board level status or activate indicator devices such as LEDs. The system master writes to the I/O configuration bits in the same way as for the PCF8574 ...
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... Active low interrupt output (open drain) V Supply ground SS I/O4–7 Quasi-bidirectional I/O pins WC Active low write control pin 2 SCL I C serial clock 2 SDA I C serial data V Supply voltage DD 3 Product data sheet PCA9501 SDA SCL I/O7 I/O6 13 I/O5 12 I/O4 11 INT TOP VIEW ...
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... BLOCK DIAGRAM PCA9501 SCL INPUT FILTER SDA POWER-ON RESET WC 2004 Sep 30 300 k INPUT/ 8-BIT 2 I C/SMBus OUTPUT CONTROL PORTS WRITE pulse READ pulse LP FILTER EEPROM 256 x 8 Figure 3. Block diagram 4 Product data sheet PCA9501 I/O0 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/ INT SW01077 ...
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... SHIFT REGISTER Figure 4. Simplified schematic diagram of each I/O DEVICE ADDRESSING Following a START condition the bus master must output the address of the slave it is accessing. The address of the PCA9501 is shown in Figure 5. Internal pullup resistors are incorporated on the hardware selectable address pins. SLAVE ADDRESS ...
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... EEPROM and 6 address pins I/O OPERATIONS (see also Figure 4) Each of the PCA9501’s eight I/Os can be independently used as an input or output. Output data is transmitted to the port by the I/O WRITE mode (see Figure 6). Input I/O data is transferred from the port to the microcontroller by the READ mode (See Figure 7). ...
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... Figure 8. Transient pull-up current I 2004 Sep 30 allows fast rising edges into heavily loaded outputs. DD DATA TO PORT R/W ACKNOWLEDGE I/O3 ACKNOWLEDGE FROM SLAVE FROM SLAVE OHt while I/O3 changes from LOW-to-HIGH and back to LOW OHt 7 Product data sheet PCA9501 DATA TO PORT I/ SW00904 ...
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... C and SMBus I/O port with interrupt, 8-bit I 2-kbit EEPROM and 6 address pins Interrupt (see Figs 9 and 12) The PCA9501 provides an open drain output (INT) which can be fed to a corresponding input of the microcontroller. This gives these chips a type of master function which can initiate an action elsewhere in the system. ...
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... Control pin (WC) is set to 0. Byte Write (see Figure 11) To perform a byte write the start condition is followed by the memory slave address and the R/W bit set to 0. The PCA9501 will respond with an acknowledge and then consider the next eight bits sent as SLAVE ADDRESS (MEMORY) ...
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... There is no ninth clock cycle for the acknowledge. Random Read (see Figure 14) The PCA9501’s random read mode allows the address to be read from to be specified by the master. This is done by performing a dummy write to set the address counter to the location to be read. ...
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... Figure 18). DATA LINE CHANGE STABLE; OF DATA DATA VALID ALLOWED Figure 16. Bit transfer STOP CONDITION SLAVE SLAVE MASTER TRANSMITTER/ RECEIVER TRANSMITTER RECEIVER Figure 18. System configuration 11 Product data sheet PCA9501 SW00542 SDA SCL P SW00543 MASTER TRANSMITTER/ RECEIVER SW00544 ...
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... In this event the transmitter must leave the data line HIGH to enable the master to generate a stop condition. NOT ACKNOWLEDGE ACKNOWLEDGE CLOCK PULSE FOR ACKNOWLEDGEMENT 2 Figure 19. Acknowledgment on the I C-bus 12 Product data sheet PCA9501 8 9 SW00545 ...
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... Sep 30 General-purpose integrated I/O with memory Replacement for PCF8574 with integrated 2-kbit EEPROM Bus master sees GPIO and EEPROM as two separate devices Six hardware address pins allow PCA9501s to be located 2 in the same I C/SMBus ASIC ...
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... Sep 30 (optional SCL SDA INT PCA9501 Figure 21. Typical application 14 Product data sheet PCA9501 2 k SUBSYSTEM 1 (e.g. temp sensor) I/0 0 I/0 INT 1 I/0 2 RESET I/0 3 SUBSYSTEM 2 (e.g. counter) I Controlled Switch I/0 6 (e.g. CBT device) ...
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... V DD –400 = — — — –0.5 0 – 0 – Product data sheet PCA9501 MIN MAX UNIT –0.5 4 – 0.5 5 – – –100 100 mA –100 100 mA — 400 mW — 100 mW – ...
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... L t Interrupt input data valid time Interrupt reset time; C 100 2004 Sep 30 10 years minimum 100,000 cycles minimum 100 Product data sheet PCA9501 SPECIFICATION MIN. TYP. MAX. UNIT — — 400 kHz — — 1.3 — — s 0.6 — ...
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... SCL SU;DAT HD;DAT Figure 22. PARAMETER is stable until the specified operation can be initiated. These parameters are Stop Condition Figure 23. 17 Product data sheet PCA9501 ACKNOWLEDGE STOP (A) CONDITION ( SU;STO VD;DAT MBD820 SW00561 MAX. UNIT (5) MIN. ...
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... amb 0 –20 –40 –60 –80 –100 –120 –140 0 0.4 2004 Sep 30 2.5 V 2.7 V 3.0 V 3.6 V 3.3 V 0.8 1.2 1.6 2.0 2.4 V (V) OH Figure 24. V versus – amb 2.5 V 2.7 V 3.0 V 3.3 V 3.6 V 0.8 1.2 1.6 2.0 2.4 V (V) OH Figure 25. V versus amb 18 Product data sheet PCA9501 SW02351 2.8 3.2 3.6 SW02350 2.8 3.2 3.6 ...
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... V overvoltage protection for the GPIO I/O pins. When the GPIO I/O are OH being used as inputs, the internal current source V sufficient V threshold noise margin. IH 2004 Sep 30 2.5 V 2.7 V 3.0 V 3.3 V 3.6 V 0.8 1.2 1.6 2.0 2.4 V (V) OH Figure 26. V versus amb should be evaluated to determine if external pull-up resistors are required to provide OH 19 Product data sheet PCA9501 SW02352 2.8 3.2 3.6 ...
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... Use only a low voltage soldering iron (less than 24 V) applied to the flat part of the lead. Contact time must be limited to 10 seconds 300 C. When using a dedicated tool, all other leads can be soldered in one operation within seconds between 270 and 320 C. 20 Product data sheet PCA9501 ...
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... Philips Semiconductors 2 C and SMBus I/O port with interrupt, 8-bit I 2-kbit EEPROM and 6 address pins TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm 2004 Sep 30 21 Product data sheet PCA9501 SOT360-1 ...
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... Philips Semiconductors 2 C and SMBus I/O port with interrupt, 8-bit I 2-kbit EEPROM and 6 address pins HVQFN20: plastic thermal enhanced very thin quad flat package; no leads; 20 terminals; body 0.85 mm 2004 Sep 30 22 Product data sheet PCA9501 SOT662-1 ...
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... Product data (9397 750 12058); ECN 853-2370 30128 dated 18 July 2003. Supersedes data of 2002 September 27 (9397 750 10327). _1 20020927 Product data (9397 750 10327); initial version Engineering Change Notice: 853–2370 28875 (2002 Sep 09) 2004 Sep 30 23 Product data sheet PCA9501 ...
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... Relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). Fax: + 24825 Document number: 24 Product data sheet PCA9501 2 C patent Koninklijke Philips Electronics N.V. 2004 All rights reserved. Published in the U.S.A. Date of release: 09-04 ...