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  Microchip Technology Semiconductor Electronic Components Datasheet  

ECE1099 Datasheet

23 x 8 Keyscan Matrix Interface via SMBus or BC-Link Bus

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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-
sion 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#
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[7:0]
ECE1099
Internal VCC1
PWRGD
VCC1 POR
2008-2018 Microchip Technology Inc.
DS00002624A-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

ECE1099 Datasheet

23 x 8 Keyscan Matrix Interface via SMBus or BC-Link Bus

No Preview Available !

ECE1099
TO OUR VALUED CUSTOMERS
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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
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http://www.microchip.com
You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page.
The last character of the literature number is the version number, (e.g., DS30000000A is version A of document DS30000000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for cur-
rent devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the
revision of silicon and revision of document to which it applies.
To determine if an errata sheet exists for a particular device, please check with one of the following:
• Microchip’s Worldwide Web site; http://www.microchip.com
• Your local Microchip sales office (see last page)
When contacting a sales office, please specify which device, revision of silicon and data sheet (include -literature number) you are
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DS00002624A-page 2
2008-2018 Microchip Technology Inc.


Part Number ECE1099
Description 23 x 8 Keyscan Matrix Interface via SMBus or BC-Link Bus
Maker Microchip
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ECE1099 Datasheet PDF






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