Datasheet > LM8333

LM8333

更新时间： 2024-09-28 11:11:59

品牌	Logo	应用领域
德州仪器 - TI		外围集成电路
页数	文件大小	规格书
26页	863K
描述
移动 I/O 配套支持 Key-Scan、I/O 扩展、PWM 和 ACCESS.bus 主机接口

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LM8333 数据手册

LM8333

www.ti.com

SNLS246K –SEPTEMBER 2006–REVISED MAY 2013

LM8333 Mobile I/O Companion Supporting Key-Scan, I/O Expansion, PWM, and

ACCESS.bus Host Interface

Check for Samples: LM8333

FEATURES

DESCRIPTION

The LM8333 Mobile I/O Companion offloads the

burden of keyboard scanning from the host, while

providing extremely low power consumption in both

operational and standby modes. It supports keypad

matrices up to 8 × 8 in size (plus another 8 special-

function keys), for portable applications such as

cellphones, PDAs, games, and other handheld

applications.

•

8 × 8 Standard Keys

•

8 Special Function Keys (SF Keys) Providing a

Total of 72 Keys for the Maximum Keyboard

Matrix

ACCESS.Bus (I²C-compatible) Communication

Interface to the Host

•

Four General Purpose Host Programmable I/O

Pins with Two Optional (Slow) External

Interrupts

Key press and release events are encoded into a

byte format and loaded into a FIFO buffer for retrieval

by the host processor. An interrupt output (IRQ) is

used to signal events such as keypad activity, a state

change on either of two interrupt-capable general-

purpose I/O pins, or an error condition. Interrupt and

error codes are available to the host by reading

dedicated registers.

•

15-byte FIFO Buffer to Store Key Pressed and

Key Released Events

Error Control with Error Reports on (FIFO

Overrun, Keypad Overrun, Invalid Command)

•

Host Programmable PWM

Host Programmable Active Time and

Debounce Time

Four general-purpose I/O pins are available, two of

which have interrupt capability.

pulse-width

modulated output based on a host-programmable

internal timer is also available, which can be used as

a general-purpose output if the PWM function is not

required.

APPLICATIONS

•

Mobile Phones

Personal Digital Assistants (PDAs)

Smart Handheld Devices

Personal Media Players

To minimize power, the LM8333 automatically enters

a low-power standby mode when there is no keypad,

I/O, or host activity.

The device is packaged in a 32–pin WQFN and a

49-pin csBGA. Both are chip-scale packages.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...26

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与LM8333相关器件

型号	品牌	获取价格	描述	数据表
LM8333_07	NSC	获取价格	Mobile I/O Companion Supporting Key-Scan, I/O Expansion, PWM, and ACCESS.bus Host Interfac
LM8333FLQ8X	NSC	获取价格	Mobile I/O Companion Supporting Key-Scan, I/O Expansion, PWM, and ACCESS.bus Host Interfac
LM8333FLQ8X/NOPB	ROCHESTER	获取价格	SPECIALTY MICROPROCESSOR CIRCUIT, QCC32, ROHS COMPLIANT, LLP-32
LM8333FLQ8X/NOPB	TI	获取价格	移动 I/O 配套支持 Key-Scan、I/O 扩展、PWM 和 ACCESS.bus
LM8333FLQ8Y	NSC	获取价格	Mobile I/O Companion Supporting Key-Scan, I/O Expansion, PWM, and ACCESS.bus Host Interfac
LM8333FLQ8Y/NOPB	NSC	获取价格	IC SPECIALTY MICROPROCESSOR CIRCUIT, QCC32, ROHS COMPLIANT, LLP-32, Microprocessor IC:Othe
LM8333FLQ8Y/NOPB	TI	获取价格	移动 I/O 配套支持 Key-Scan、I/O 扩展、PWM 和 ACCESS.bus
LM8333GGR8	NSC	获取价格	Mobile I/O Companion Supporting Key-Scan, I/O Expansion, PWM, and ACCESS.bus Host Interfac
LM8333GGR8/NOPB	NSC	获取价格	IC SPECIALTY MICROPROCESSOR CIRCUIT, PBGA49, ROHS COMPLIANT, MICRO ARRAY-49, Microprocesso
LM8333GGR8/NOPB	TI	获取价格	Mobile I/O Companion Supporting Key-Scan, I/O Expansion, PWM, and ACCESS.bus Host Interfac

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