ELAN eKM 6251 Service Manual
eKM6251
www.DataSheet4U.com
Preliminary
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.
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Preliminary
www.DataSheet4U.com
U+P RF Mouse Rx Controller
PIN ASSIGNMENT
U1
1
2
3
4
5
6
7
8
eKM6251
RFC1
RFC2
RxLED
RFM
VSS
NC
V3.3
OSCI
D+/DATA
RFD
Connect
IDR
D-/CLK
VDD
OSCO
16
15
14
13
NC
12
11
10
9
PIN DESCRIPTOR
Pin No. Symbol I/O Function
eKM6251
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 Output terminal for crystal oscillator
10 VDD - 5.0V Power supply
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
* This specification are subject to be changed without notice.
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