JAJSN80E August   2009  – May 2022 TCA9535

PRODUCTION DATA  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 I2C Interface Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Typical Characteristics
      1.      Parameter Measurement Information
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 5-V Tolerant I/O Ports
      2. 7.3.2 Hardware Address Pins
      3. 7.3.3 Interrupt ( INT) Output
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power-On Reset (POR)
      2. 7.4.2 Powered-Up
    5. 7.5 Programming
      1. 7.5.1 I2C Interface
        1. 7.5.1.1 Bus Transactions
          1. 7.5.1.1.1 Writes
          2. 7.5.1.1.2 Reads
      2. 7.5.2 Device Address
      3. 7.5.3 Control Register and Command Byte
    6. 7.6 Register Maps
      1. 7.6.1 Register Descriptions
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
        1. 8.2.1.1 Calculating Junction Temperature and Power Dissipation
        2. 8.2.1.2 Minimizing ICC When I/O is Used to Control LED
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 サポート・リソース
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

7.5.3 Control Register and Command Byte

Following the successful acknowledgment of the address byte, the bus controller sends a command byte shown in Table 7-3 that is stored in the control register in the TCA9535. Three bits of this data byte state the operation (read or write) and the internal register (input, output, polarity inversion, or configuration) that is affected. This register can be written or read through the I2C bus. The command byte is sent only during a write transmission.

When a command byte has been sent, the register that was addressed continues to be accessed by reads until a new command byte has been sent. Figure 7-12 shows the control register bits.

GUID-5192530A-1FD4-412B-8AF0-5ED1A81F141D-low.gifFigure 7-12 Control Register Bits
Table 7-3 Command Byte
CONTROL REGISTER BITSCOMMAND
BYTE (HEX)		REGISTERPROTOCOLPOWER-UP
DEFAULT
B2B1B0
0000x00Input Port 0Read bytexxxx xxxx
0010x01Input Port 1Read bytexxxx xxxx
0100x02Output Port 0Read-write byte1111 1111
0110x03Output Port 1Read-write byte1111 1111
1000x04Polarity Inversion Port 0Read-write byte0000 0000
1010x05Polarity Inversion Port 1Read-write byte0000 0000
1100x06Configuration Port 0Read-write byte1111 1111
1110x07Configuration Port 1Read-write byte1111 1111