ECE1117 Datasheet, PDF (1/83 Pages) Microchip Technology – Multi-Function BC-Link/SMBus Companion Device

ECE1117
Multi-Function BC-Link^TM/SMBus Companion Device
Product Features
• Microchip BC-Link™ Slave Interface to Host EC
- 3-pin point-to-point communication link to
Embedded Controller
• Optional SMBus Slave Interface to Host EC
- BC-Link/SMBus protocol autodetect
- Strap pin selects between two slave
addresses at POR
- Dynamically programmed slave address after
POR
• Keyboard Scan Matrix
- Up to 19x8 Keyboard Scan Matrix
• LED Output Pins
- 7 LED Output Pins
- 4 with 20mA current sink
- 3 with 4mA current sink
- Multiple Clock Rates
- Breathe capability
- Open Drain
- 5V tolerant
- All can be synchronized
• General Purpose I/O Pins
- 16 General Purpose I/O Pins
- All are BC Bus addressable I/O Pins
- All are Maskable Hardware Wake-Event
Capable
- All are Programmable Open-Drain/Push-Pull
Outputs
• Two PS/2 Ports
• One Power Plane
- Low Standby Current in Sleep Mode
• 3.3 Volt Operation
• Package
- 48-pin QFN, 7x7mm body, 0.5mm pitch
- 48-pin SQFN, 7x7mm body, 0.5mm pitch
Description
The ECE1117 is a 48-pin 3.3V multi-function compan-
ion device. The ECE1117 communicates with an
upstream host via BC-Link or SMBus.
The ECE1117 is typically mounted in the keyboard
assembly. By mounting the ECE1117 onto the key-
board assembly, the keyboard signals as well as the
touchpad/point stick PS/2 signals and the backlight
PWMs are routed from the keyboard to the mother-
board over a single BC-Link or SMBus connection.
 2014 - 2015 Microchip Technology Inc.
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