ECE1105

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 Expansion or GPIO Expansion device. The device supports a keyboard scan matrix of 23x8 and has two PS/2 ports for touchpad and/or pointer stick support. 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 Two PS/2 Ports - Touch Pad Support - Pointer Stick Support 40 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 - 48-Pin, QFN RoHS Compliant package - 0.5mm Pitch - 7x7m Body size Block Diagram BC Bus SMBus BC Bus / SMBus Autodetect LSBC Bus Interface SMBus Interface LSBC_INT# SMBus_INT# Internal VCC1 PWRGD GPIO[0:39 ] Registers Muxed with KSO & KSI Status Mas...