LM8327
- Internal RC Oscillator, no External Clock Required
- Internal PWM Clock Generation, no External Clock Required
- Programmable I2C-compatible ACCESS.Bus Address (Default 0x8A)
- Support for Keypad Matrices of up to of 8 x 12 Keys, Plus 8 Special Function (SF) Keys, for a Full 104 Key Support
- Support for up to 26 Direct Connect Keys
- I2C-Compatible ACCESS.Bus Slave Interface at 100 kHz (Standard-Mode) and 400 kHz (Fast-Mode)
- Three Host-Programmable PWM Outputs for Smooth LED Brightness Modulation
- Supports General-Purpose I/O Expansion on Pins not Otherwise Used for Keypad or PWM Output
- 15-byte Key Event Buffer
- Multiple Key Event Storage
- Key Events, Errors, and Dedicated Hardware Interrupts Request Host Service by Asserting an IRQ Output
- Automatic HALT Mode for Low Power Operation
- Wake-Up from HALT Mode on any Interface (Rising Edge, Falling Edge or Pulse)
- Three PWM Outputs with Dedicated Script Buffer for up to 32 Commands
- Register-Based Command Interpreter with Auto-Increment Address
Features, Host-Controlled
- PWM Scripting for 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.)
Features, Key Device
- 1.8V ± 10% Single-Supply Operation
- On-Chip Power-On Reset (POR)
- ESD Glitch Filter on RESETN Pin
- Watchdog Timer
- Dedicated Slow Clock Input for 32 kHz up to 8MHz
- −40°C to +85°C Temperature Range
- 36-pin csBGA Package
All trademarks are the property of their respective owners.
The LM8327 GenI/O-Expander and Keypad Controller is a dedicated device to unburden a host processor from scanning a matrix-addressed keypad and to provide flexible and general purpose, host-programmable input/output functions. Three independent PWM timer outputs are provided for dynamic LED brightness modulation.
It communicates with a host processor through an I2C-compatible ACCESS.bus serial interface. It can communicate in Standard (100 kHz) and Fast-Mode (400 kHz) in slave Mode only.
All available input/output pins can alternately be used as a direct key input connection, an input or an output in a keypad matrix, or as a host-programmable general purpose input or output.
Any pin programmed as an input can also sense hardware interrupts. The interrupt polarity (“high-to-low” or “low-to-high” transition) is thereby programmable.
The LM8327 follows a predefined register based set of commands. Upon startup (power on) a configuration file must be sent from the host to setup the hardware of the device.
기술 자료
유형 | 직함 | 날짜 | ||
---|---|---|---|---|
* | Data sheet | LM8327 Mobile I/O Companion Supporting Keyscan, I/O Expansion, PWM, & ACCESS.bus datasheet (Rev. A) | 2013/05/02 | |
Application note | Understanding the I2C Bus | PDF | HTML | 2015/06/30 | |
Application note | Maximum Clock Frequency of I2C Bus Using Repeaters | 2015/05/15 | ||
Application note | I2C Bus Pull-Up Resistor Calculation | PDF | HTML | 2015/02/13 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
PSPICE-FOR-TI — TI 설계 및 시뮬레이션 툴용 PSpice®
TI 설계 및 시뮬레이션 환경용 PSpice는 기본 제공 라이브러리를 이용해 복잡한 혼합 신호 설계를 시뮬레이션할 수 있습니다. 레이아웃 및 제작에 (...)
TINA-TI — SPICE 기반 아날로그 시뮬레이션 프로그램
패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
---|---|---|
CS-BGA (NYB) | 36 | Ultra Librarian |
주문 및 품질
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
- 팹 위치
- 조립 위치
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.