Datasheet VCNL36825T (Vishay) - 7
| Manufacturer | Vishay |
| Description | Proximity Sensor With Interrupt, VCSEL, and I2C Interface |
| Pages / Page | 16 / 7 — VCNL36825T. APPLICATION INFORMATION Pin Connection With the Host. Digital … |
| File Format / Size | PDF / 238 Kb |
| Document Language | English |
VCNL36825T. APPLICATION INFORMATION Pin Connection With the Host. Digital Interface
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VCNL36825T
www.vishay.com Vishay Semiconductors
APPLICATION INFORMATION Pin Connection With the Host
VCNL36825T 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 is proposed for the pull high resistors of I2C except 10 kΩ applied on INT pin. Vpull_up VDD 1 μF 2.2 kΩ 2.2 kΩ 4 5 VDD SCL SCL 6 SDA SDA 10 kΩ VCNL36825T Baseband 1 2 INT INT NC NC or GND GND 3 Fig. 8 - Hardware Pin Connection Diagram
Digital Interface
VCNL36825T 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 VCNL36825T. As Fig. 9 shows, VCNL36825T’s I2C command format is simple for read and write operations between VCNL36825T and the host. The white sections indicate host activity and the gray sections indicate VCNL36825T’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 byte write command to VCNL36825T 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 byte read data from VCNL36825T 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 VCNL36825T response N = not acknowledge Fig. 9 - Write Word and Read Word Protocol Rev. 1.2, 22-Mar-2021
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Document Number: 80235 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
VCNL36825T 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 is proposed for the pull high resistors of I2C except 10 kΩ applied on INT pin. Vpull_up VDD 1 μF 2.2 kΩ 2.2 kΩ 4 5 VDD SCL SCL 6 SDA SDA 10 kΩ VCNL36825T Baseband 1 2 INT INT NC NC or GND GND 3 Fig. 8 - Hardware Pin Connection Diagram
Digital Interface
VCNL36825T 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 VCNL36825T. As Fig. 9 shows, VCNL36825T’s I2C command format is simple for read and write operations between VCNL36825T and the host. The white sections indicate host activity and the gray sections indicate VCNL36825T’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 byte write command to VCNL36825T 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 byte read data from VCNL36825T 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 VCNL36825T response N = not acknowledge Fig. 9 - Write Word and Read Word Protocol Rev. 1.2, 22-Mar-2021
7
Document Number: 80235 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
