User's Manual

SK-8810 RF WIRELESS KEYBOARD Page No: 3 of
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3. Electrical Specification
Functional Block diagram:
Microprocessor MA6231
3.1 Keyboard Transmitter
Operating voltage
The operating voltage range for keyboard is 2 ~ 3.3 Vdc.
There are 2 AA batteries providing 3.0V for operation f
Current consumption
Typical current consumption is 8 mA, .Maximum at 10 mA
Suspend current is about 80 uA.
Power consumption
The power consumption is less than 0.024 W at operation mode and 240 uW
at sleep mode.
Low Power Indicator
Low power indicator on the keyboard will be lit during hitting key when the
battery voltage in the keyboard transmitter is less than about 2V.
CPU
Crystal : 32.768KHz
RF Link
PC Host
PS2 Interface
cable
Low power indicator
N
um
L
,CAP, Scrol
LED
Data indicator
Keyboard
(Base-Band)
CPU
Crystal : 32.768KHz
TX-Freq :
27.145 MHz
RX-Freq :
Crystal : 26.690
/
2
6.590
MHz
Base-Band
Microprocessor
MA6135