SC83053 PS2键盘IC

(Ta=25°C)

-0.3~+6 V

The keyboard will buffer 16 bytes in a first-in-first-out order when the system is able to receive scan codes from

the keyboard. The response codes and repeated codes will not be buffered. If keystrokes generate a multiple-

byte sequence, the entire sequence must fit into the buffer or the keystroke is discarded and a buffer-overrun

condition occurs.

The duration of the keyboard Power-on-Reset(POR) should be within 150 milliseconds and 2 seconds after the

power is applied to the keyboard.

After executing POR , the keyboard executes a self test. The LEDs are turned on at the beginning and off at

When the keyboard is ready to send data to the system, it first checks clock and data lines. If either one is in

the low state, data is stored in the keyboard buffer. If both are in the high state, keyboard starts clocking data out.

Data will be valid before the trailing edge and after the leading edge of the clock pulse. During the transmission

the keyboard checks the clock line at least every 60 microseconds . If the system lowers the clock lines before

the leading edge of the 10th clock, the keyboard should stop sending, then buffer the data and return clock and

data lines to high state.

When the system is ready to send data to the keyboard, it first checks clock line to see if keyboard is sending

issues a RESEND to the system