Preliminary eKM6251 U+P RF Mouse Rx Controller GENERAL DESCRIPTOR The eKM6251 is standard RF Mouse Receiver (Rx) Controller for USB and PS/2 compatible interface. It’s receives the RF packet data from RF Rx module (circuits). And decode the RF packet data and transmitting the data to PC by USB or PS/2 interface. The eKM6251 have internal EEPROM to storage the Device ID, do not need the external storage device like 93C46. It’s have built-in RF signal sampling and noise immunity function to improve the RF data decode efficiency. FEATURE Operating voltage: 2.5V~5.5V Built-in regulator to generate 3.3V Operating frequency: 6.00Mhz Built-in USB Device Controller and Interface. Support USB and PS/2 detect mode and compatible interface. Built-in EEPROM to storage 1 byte Device ID (255 sets) Built-in RF signal sampling and noise immunity function. Support a LED to display RF packet receive status and ID set mode. Using jump connect to set Device ID into default ID. Support RF monitor pin to check RF packet receive situation. To match with RF Mouse Tx controller: EM84100 series EKM6711 : Optical RF Mouse Tx Package: 16 pin DIP and NSOP (150mil) APPLICATION USB RF Mouse Rx PS/2 RF Mouse Rx * This specification are subject to be changed without notice. 1 2002/11/15 Preliminary eKM6251 U+P RF Mouse Rx Controller PIN ASSIGNMENT U1 1 2 3 4 5 6 7 8 RFC1 RFC2 RxLED RFM VSS NC V3.3 OSCI RFD Connect IDR NC D+/DATA D-/CLK VDD OSCO 16 15 14 13 12 11 10 9 eKM6251 PIN DESCRIPTOR Pin No. Symbol I/O Function 1 RFC1 O RF module control pin 1 (channel control) 2 RFC2 O RF module control pin 2 (power down control) 3 RxLED O Direct sink LED to display RF packet receive. 4 RFM O RF monitor pin, to check RF packet receive situation. 5 VSS - Ground 6 NC - NC 7 V3.3 O V3.3 DC voltage output from internal regulator 8 OSCI I 6.00Mhz ceramic resonator crystal input 9 OSCO I/O 10 VDD - 11 D-/CLK I/O USB: D- line PS/2: CLK line (It’s need external USB to PS/2 transfer) 12 D+/DATA I/O USB: D+ line PS/2: CLK line (It’s need external USB to PS/2 transfer) 13 NC - NC 14 IDR I ID Reset button, its set device ID to default ID (internal pull high resistor) 15 CONNECT I Connect button, it’s will receive new device ID duration 10 seconds. (internal pull high resistor) 16 RFD I RF data input Output terminal for crystal oscillator 5.0V Power supply * This specification are subject to be changed without notice. 2 2002/11/15 Preliminary eKM6251 U+P RF Mouse Rx Controller ABSOLUTE MAXIMUM RATINGS Items Sym. Condition Rating 0℃~70℃ Temperature under bias TOPR Storage temperature TSTR -65℃~150℃ Input voltage VIN -0.3V~+6.0V Output voltage VO -0.3V~+6.0V DC ELECTRICAL CHARACTERISTIC Parameter Sym. Condition Min. Typ. Max. Unit * This specification are subject to be changed without notice. 3 2002/11/15 eKM6251 U+P RF Mouse Rx Controller Preliminary APPLICATION CIRCUIT RF Control2(Power Down) RF Control1(Channel) R6 RF Data D15 U10 VCC R RxLED RF Monitor C7 1uF 1 2 3 4 5 6 7 8 RFC1 RFC2 RxLED RFM VSS NC V3.3 OSCI SW8 RFD Connect IDR NC D+/DATA D-/CLK VDD OSCO 16 15 14 13 12 11 10 9 CONNECT 1 J2 2 ID Reset USB D+ / DATA USB D- / CLK VCC VCC C6 10uF eKM6251 Q5 J6 1 2 3 4 DD+ 6.00Mhz C4 20pF C5 20pF USB CONN VCC CLK DATA 1 2 3 6 5 4 PS2/MS * This specification are subject to be changed without notice. 4 2002/11/15