Datasheet VCNL36826S (Vishay) - 7
| Hersteller | Vishay |
| Beschreibung | Proximity Sensor With Interrupt, VCSEL, and I²C Interface |
| Seiten / Seite | 16 / 7 — VCNL36826S. APPLICATION INFORMATION Pin Connection with the Host. Digital … |
| Dateiformat / Größe | PDF / 196 Kb |
| Dokumentensprache | Englisch |
VCNL36826S. APPLICATION INFORMATION Pin Connection with the Host. Digital Interface
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VCNL36826S
www.vishay.com Vishay Semiconductors
APPLICATION INFORMATION Pin Connection with the Host
VCNL36826S integrates proximity sensor, and IR VCSEL all together with I2C interface. It is very easy for the baseband (CPU) to access PS output data via I2C interface without extra software algorithms. The hardware schematic is shown in the following diagram. One additional 1 μF capacitor in the circuit is used for power supply noise rejection and 2.2 kΩ are proposed for the pull high resistor of I2C except 10 kΩ applied on INT pin. Vpull_up VDD 1 μF 2.2 kΩ 2.2 kΩ 6 8 VDD SCL SCL 7 SDA SDA 5 VDD 10 kΩ VCNL36826S Baseband 2 4 INT INT NC NC 3 NC NC or GND GND 1 Fig. 9 - Hardware Pin Connection Diagram
Digital Interface
VCNL36826S applies single slave address 0x60 (HEX) of 7-bit addressing following I2C protocol. All operations can be controlled by the command register. The simple command structure helps users easily program the operation setting and latch the light data from VCNL36826S. As Fig. 9 shows, VCNL36826S’s I2C command format is simple for read and write operations between VCNL36826S and the host. The white sections indicate host activity and the gray sections indicate VCNL36826S’s acknowledgement of the host access activity. Write word and read word protocol is suitable for accessing registers particularly for 12-bit PS data. Interrupt can be cleared by reading data out from register: INT_Flag. All command codes should follow read word and write word protocols. Send word → write command to VCNL36826S 1 7 1 1 8 1 8 1 8 1 1 S Slave address Wr A Command code A Data byte low A Data byte high A P Receive word → read data from VCNL36826S 1 7 1 1 8 1 1 7 1 1 8 1 8 1 1 S Slave address Wr A Command code A S Slave address Rd A Data byte low A Data byte high N P S = start condition Host action P = stop condition A = acknowledge VCNL36826S response N = not acknowledge Fig. 10 - Write Word and Read Word Protocol Rev. 1.0, 29-Jan-2020
7
Document Number: 84964 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
www.vishay.com Vishay Semiconductors
APPLICATION INFORMATION Pin Connection with the Host
VCNL36826S integrates proximity sensor, and IR VCSEL all together with I2C interface. It is very easy for the baseband (CPU) to access PS output data via I2C interface without extra software algorithms. The hardware schematic is shown in the following diagram. One additional 1 μF capacitor in the circuit is used for power supply noise rejection and 2.2 kΩ are proposed for the pull high resistor of I2C except 10 kΩ applied on INT pin. Vpull_up VDD 1 μF 2.2 kΩ 2.2 kΩ 6 8 VDD SCL SCL 7 SDA SDA 5 VDD 10 kΩ VCNL36826S Baseband 2 4 INT INT NC NC 3 NC NC or GND GND 1 Fig. 9 - Hardware Pin Connection Diagram
Digital Interface
VCNL36826S applies single slave address 0x60 (HEX) of 7-bit addressing following I2C protocol. All operations can be controlled by the command register. The simple command structure helps users easily program the operation setting and latch the light data from VCNL36826S. As Fig. 9 shows, VCNL36826S’s I2C command format is simple for read and write operations between VCNL36826S and the host. The white sections indicate host activity and the gray sections indicate VCNL36826S’s acknowledgement of the host access activity. Write word and read word protocol is suitable for accessing registers particularly for 12-bit PS data. Interrupt can be cleared by reading data out from register: INT_Flag. All command codes should follow read word and write word protocols. Send word → write command to VCNL36826S 1 7 1 1 8 1 8 1 8 1 1 S Slave address Wr A Command code A Data byte low A Data byte high A P Receive word → read data from VCNL36826S 1 7 1 1 8 1 1 7 1 1 8 1 8 1 1 S Slave address Wr A Command code A S Slave address Rd A Data byte low A Data byte high N P S = start condition Host action P = stop condition A = acknowledge VCNL36826S response N = not acknowledge Fig. 10 - Write Word and Read Word Protocol Rev. 1.0, 29-Jan-2020
7
Document Number: 84964 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000