Details, datasheet, quote on part number: M95128
CategoryMemory => ROM => EEPROM => 128 Kb
DescriptionXpander Logic
16-bit enhanced port expander with keypad and PWM controller Xpander Logic
CompanyST Microelectronics, Inc.
DatasheetDownload M95128 datasheet
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Features, Applications
16-bit enhanced port expander with keypad and PWM controller Xpander Logic

16 GPIOs (8 operate at core supply VCC , 8 operate at IO supply Vio) Operating voltage 3.3 V Hardware keypad controller (8*8 matrix with 4 optional dedicated keys max) Keypad controller capable of detecting keypress in hibernation mode 4 basic PWM controller for LED brightness control Interrupt output (open drain) pin Optional 32 kHz clock input 8-channel programmable level translator Advanced power management system Ultra-low standby-mode current Package x 3 mm)


The is a GPIO (general purpose input/output) port expander able to interface a main digital ASIC via the two-line bidirectional bus (I2C). A separate GPIO expander IC is often used in mobile multimedia platforms to solve the problems of the limited number of GPIOs typically available on the digital engine. The STMPE1601 offers great flexibility, as each I/O can be configured as input, output or specific functions. The device is able to scan a keyboard, also provides PWM outputs for brightness control in backlight, and GPIO. This device has been designed to include very low quiescent current, and a wake-up feature for each I/O, to optimize the power consumption of the IC. Potential applications of the STMPE1601 include portable media players, game consoles, mobile and smart phones.

Order code STMPE1601TBR Package TFBGA25 Packaging Tape and reel

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

Pin connection. 5 Pin assignment and TFBGA ball location. 5 Pin mapping to TFBGA (top through view). 6 GPIO pin functions. 7

Start condition. 12 Stop condition. 12 Acknowledge bit (ACK). 13 Data input. 13 Slave device address. 13 Memory addressing. 13 Operating modes. 14 General call address. 15

7.2 7.3 States of operation. 19 Autosleep. 20 Keypress detect in the hibernate mode. 20
8.1 8.2 Clock source. 21 Power mode programming sequence. 22
10.2.1 10.2.2 Programming sequence for Hotkey. 31 Minimum pulse width. 31
Data registers. 47 Keypad combination key registers. 51 Miscellaneous features. 54


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