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GreenCoderTM UR5HCFJL Zero-PowerTM Keyboard Encoder for Portable Systems GreenCoder is a trademark of Semtech Corp. All other trademarks belong to their respective companies. Copyright Semtech, 1997-2001 DOC5-FJL-DS-106 www.semtech.com 1 HID & SYSTEM MANAGEMENT PRODUCTS, KEYCODERTM FAMILY DESCRIPTION FEATURES The GreenCoderTM (UR5HCFJL) is a unique, Zero-PowerTM keyboard encoder that provides an optimum performance level for both battery- operated and desktop systems. The GreenCoderTM scans, debounces and encodes an 8 X 16 keyboard matrix, and will provide direct drive for 3 LEDs and two bi-directional channels for communication with a BIOS- compatible system as well as an additional keyboard-compatible device. It fully supports all three PS/2 scan code sets and will implement up to three alternate keyboard layers for full 101/102 functionality. The GreenCoderTM employs a unique Self-Power ManagementTM method that reduces the power consumption of the keyboard sub-system to an unprecedented minimum, transparently and without user intervention. In “Active” mode, the encoder consumes less than 2 mA (Typ @5V). In “Sleep” mode the encoder consumes less than 2 µA (Typ @5V) The encoder can even nap between keystrokes and therefore it is rarely active and rarely consumes significant levels of power. A "stand-by" mode (600 µA Typ @5V) is entered for as long as a periodic task is active. After a programmed period of user inactivity the GreenCoderTM gradually dims the LEDs for further power savings. The GreenCoderTM is ideal for use in battery laptop/notebook designs and Energy Star compliant keyboards. OPT KD KC EKC EKD CL C0 C1 C2 C3 C4 R7 SL R5 R4 R3 R2 R1 R0 C8 C9 C10 40 1 6 7 12 17 18 23 28 29 34 39 PLCC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 _RESET DRV VX NL R6 OPT KD KC EKC EKD CL C0 C1 C2 C3 C4 C5 C6 C7 GND VCC OSCI OSCO EKC1 R7 SL R5 R4 R3 R2 R1 R0 C8 C9 C10 C11 C12 C13 C14 C15 DIP R6 OPT KD KC EKC EKD CL C0 C1 C2 C3 SL R5 R4 R3 R2 R1 R0 C8 C9 C10 C11 QFP • Laptop/Notebook • Portable Equipment • Energy Star Compliant • Medical Instruments • Palmtops/ PDAs • Wakes-up only to respond to an external event and for a minimum period of time (2 mA current consumption) • Provides interface for external keyboard/keypad or other 8042- compatible device • Custom versions available in small or large quantities • Optimized power-saving operation with idle consumption of less than 2 µA • Programmable LED dimming for further power savings • Ready to interface to Fujitsu's 7316, 7654,7656, and 1406 keyboards • 3, 3.3 and 5 Volt operation APPLICATIONS PIN ASSIGNMENTS |
