ECE1099

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 Expansion or GPIO Expansion device. The device supports a keyboard scan matrix of 23x8. The device is connected to a Master via the BC-Link interface or via the SMBus. KSI and KSO signals are multiplexed with GPIOs. Up to 23x8 Keyboard Scan Matrix 32 Multiplexed General Purpose I/O pins - All are MCU addressable I/O Pins BC-Link Interconnect Bus - 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 BC Bus SMBus BC Bus / SMBus Autodetect LSBC Bus Interface SMBus Interface BC_INT# SMBus_INT# Internal Address / Data Bus GPIO[0:37] Registers Muxed with KSO & KSI Status Mask Expander Base register Output Control registers 5 5 to 23 Mux KSO[22:00] KSI register 8 KSI[7:0] 8 Mask Register KSI[7...