ECE1105-HZH Microchip

ECE1105 GPIO Expansion, PS/2, 23x8 Keyscan Matrix Interface via SMBus or BC-Link Bus Highlights Features The ECE1105 is a 48-Pin 3.3V Keyboard Scan Expan- Up to 23x8 Keyboard Scan Matrix sion or GPIO Expansion device. The device supports a Two PS/2 Ports keyboard scan matrix of 23x8 and has two PS/2 ports - Touch Pad Support for touchpad and/or pointer stick support. The device is - Pointer Stick Support connected to a Master via the BC-Link interface or via 40 Multiplexed General Purpose I/O pins the SMBus. - All are MCU addressable I/O Pins KSI and KSO signals are multiplexed with GPIOs. BC-Link Interconnect Bus - Link to embedded controller SMBus Interconnect - One of two address selection 3.3V Operation - 48-Pin, QFN RoHS Compliant package - 0.5mm Pitch - 7x7m Body size Block Diagram GPIO 0:39 Registers Muxed with KSO & KSI Status LSBC Bus Mask Interface Expander BC Bus 5 to 23 Base KSO 22:00 5 Mux register SMBus SMBus Output Interface Control registers BC Bus / SMBus Autodetect KSI KSI 7:0 register LSBC INT 8 SMBus INT 8 Mask KSI 7:0 Register PS2 CLK PS2 DAT PS2 Interface TB CLK TP DAT Internal VCC1 PWRGD VCC1 POR 2008-2018 Microchip Technology Inc. DS00002622A-page 1 Internal Address / Data Bus TEST VCC1ECE1105 TO OUR VALUED CUSTOMERS It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and enhanced as new volumes and updates are introduced. If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via E-mail at docerrors microchip.com. We welcome your feedback. Most Current Data Sheet To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at: