主页 接口 I2C & I3C ICs I2C 通用 I/O (GPIO)

LM8323

正在供货

移动 I/O 配套支持 Keyscan、I/O 扩展、PWM 和 ACCESS.bus 主机接口

产品详情

Supply voltage (min) (V) 1.62 Supply voltage (max) (V) 1.98 Rating Catalog Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85
Supply voltage (min) (V) 1.62 Supply voltage (max) (V) 1.98 Rating Catalog Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85
CS-BGA (NYB) 36 12.25 mm² 3.5 x 3.5
  • Key Features
    • Supports Keypad Matrices of up to 8 × 12 Keys Plus 8 Special-function (SF) Keys for a Total of 104 Keys. SF Keys Pull Keypad Scan Inputs Directly to Ground, Rather than Connecting to a Keypad Scan Output.
    • Supports I2C-compatible ACCESS.bus Interface in Slave Mode up to 400 kHz (Fast-mode).
    • Three Host-programmable PWM Outputs Useful for Smooth LED Brightness Modulation.
    • Supports General-purpose I/O Expansion on Pins Not Otherwise Used for Keypad or Rotary Encoder Interface.
    • Key-scan Event Storage in a FIFO Buffer for up to 15 Events.
    • Key Events, Errors, and Dedicated Hardware Interrupts Request Host Service by Asserting the IRQ Output.
    • The Correct Reception of a Command May be Assumed, if No Error is Reported from the LM8323 After Receiving it.
    • Wake-up from Halt Mode on any Matrix Key-scan Event, any Use of the SF Keys, or Any Activity on the ACCESS.bus Interface, or Any Change in the Rotary Encoder Counter Value (if Enabled).
  • Host-Controlled Functions
    • Three PWM Outputs
    • Period of Inactivity that Triggers Entry into Halt Mode
    • Debounce Time for Reliable Key Event Polling
    • Configuration of General-purpose I/O Ports
    • Various Initialization Options (Keypad Size, etc.)
  • Key Device Characteristics
    • 1.8V ± 180 mV Single-supply Operation
    • On-chip Power-on Reset (POR)
    • Watchdog Timer
    • Dedicated Slow Clock Input for 32 kHz
    • -40°C to +85°C Industrial Temperature Range
    • 36-pin csBGA Package

All trademarks are the property of their respective owners.

  • Key Features
    • Supports Keypad Matrices of up to 8 × 12 Keys Plus 8 Special-function (SF) Keys for a Total of 104 Keys. SF Keys Pull Keypad Scan Inputs Directly to Ground, Rather than Connecting to a Keypad Scan Output.
    • Supports I2C-compatible ACCESS.bus Interface in Slave Mode up to 400 kHz (Fast-mode).
    • Three Host-programmable PWM Outputs Useful for Smooth LED Brightness Modulation.
    • Supports General-purpose I/O Expansion on Pins Not Otherwise Used for Keypad or Rotary Encoder Interface.
    • Key-scan Event Storage in a FIFO Buffer for up to 15 Events.
    • Key Events, Errors, and Dedicated Hardware Interrupts Request Host Service by Asserting the IRQ Output.
    • The Correct Reception of a Command May be Assumed, if No Error is Reported from the LM8323 After Receiving it.
    • Wake-up from Halt Mode on any Matrix Key-scan Event, any Use of the SF Keys, or Any Activity on the ACCESS.bus Interface, or Any Change in the Rotary Encoder Counter Value (if Enabled).
  • Host-Controlled Functions
    • Three PWM Outputs
    • Period of Inactivity that Triggers Entry into Halt Mode
    • Debounce Time for Reliable Key Event Polling
    • Configuration of General-purpose I/O Ports
    • Various Initialization Options (Keypad Size, etc.)
  • Key Device Characteristics
    • 1.8V ± 180 mV Single-supply Operation
    • On-chip Power-on Reset (POR)
    • Watchdog Timer
    • Dedicated Slow Clock Input for 32 kHz
    • -40°C to +85°C Industrial Temperature Range
    • 36-pin csBGA Package

All trademarks are the property of their respective owners.

The LM8323 key-scan controller is a dedicated device to unburden a host from scanning a matrix-addressed keypad. In addition, the LM8323 provides general-purpose I/O expansion, a rotary encoder interface and PWM outputs useful for dynamic LED brightness modulation.

It communicates with the host through an I2C-compatible ACCESS.bus interface. An interrupt output is available for signaling key-press and key-release events. Communication frequencies up to 400 kHz (Fast-mode) bus speed are supported. The LM8323 supports a predefined set of commands. These commands enable a host device to keep control over all functions.

The LM8323 key-scan controller is a dedicated device to unburden a host from scanning a matrix-addressed keypad. In addition, the LM8323 provides general-purpose I/O expansion, a rotary encoder interface and PWM outputs useful for dynamic LED brightness modulation.

It communicates with the host through an I2C-compatible ACCESS.bus interface. An interrupt output is available for signaling key-press and key-release events. Communication frequencies up to 400 kHz (Fast-mode) bus speed are supported. The LM8323 supports a predefined set of commands. These commands enable a host device to keep control over all functions.

下载 观看带字幕的视频 视频

技术文档

star =有关此产品的 TI 精选热门文档
未找到结果。请清除搜索并重试。
查看全部 4
类型 标题 下载最新的英语版本 日期
* 数据表 Mobile I/O Comp Supp Keyscan, I/O Expansion, PWM, & ACCESS.bus Host I/F 数据表 (Rev. A) 2013年 3月 26日
应用手册 Understanding the I2C Bus PDF | HTML 2015年 6月 30日
应用手册 Maximum Clock Frequency of I2C Bus Using Repeaters 2015年 5月 15日
应用手册 I2C Bus Pull-Up Resistor Calculation PDF | HTML 2015年 2月 13日

设计和开发

如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。

模拟工具

PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice®

PSpice® for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence® 的模拟分析引擎。PSpice for TI 可免费使用,包括业内超大的模型库之一,涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助 PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。

在 PSpice for TI 设计和仿真工具中,您可以搜索 TI (...)
模拟工具

TINA-TI — 基于 SPICE 的模拟仿真程序

TINA-TI 提供了 SPICE 所有的传统直流、瞬态和频域分析以及更多。TINA 具有广泛的后处理功能,允许您按照希望的方式设置结果的格式。虚拟仪器允许您选择输入波形、探针电路节点电压和波形。TINA 的原理图捕获非常直观 - 真正的“快速入门”。

TINA-TI 安装需要大约 500MB。直接安装,如果想卸载也很容易。我们相信您肯定会爱不释手。

TINA 是德州仪器 (TI) 专有的 DesignSoft 产品。该免费版本具有完整的功能,但不支持完整版 TINA 所提供的某些其他功能。

如需获取可用 TINA-TI 模型的完整列表,请参阅:SpiceRack - 完整列表 

需要 HSpice (...)

用户指南: PDF
英语版 (Rev.A): PDF
封装 引脚 CAD 符号、封装和 3D 模型
CS-BGA (NYB) 36 Ultra Librarian

订购和质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息:
  • 制造厂地点
  • 封装厂地点

支持和培训

视频