ECE1099-FZG Microchip

ECE1099 GPIO Expansion, 23x8 Keyscan Matrix Interface via SMBus or BC-Link Bus Highlights Features The ECE1099 is a 40-Pin 3.3V Keyboard Scan Expan- Up to 23x8 Keyboard Scan Matrix sion or GPIO Expansion device. The device supports a 32 Multiplexed General Purpose I/O pins keyboard scan matrix of 23x8. The device is connected - All are MCU addressable I/O Pins to a Master via the BC-Link interface or via the SMBus. BC-Link Interconnect Bus KSI and KSO signals are multiplexed with GPIOs. - Link to embedded controller SMBus Interconnect - One of two address selection 3.3V Operation - 40-Pin, QFN RoHS Compliant package - 0.5mm Pitch - 6x6mm Body size Block Diagram GPIO 0:37 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 BC INT 8 SMBus INT 8 Mask KSI 7:0 Register Internal VCC1 PWRGD VCC1 POR ECE1099 2008-2018 Microchip Technology Inc. DS00002624A-page 1 Internal Address / Data Bus TEST VCC1ECE1099 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: