What are the other modes used in keyboard modes?

1.	What are the other modes used in keyboard modes?
Answer» KEYBOARD MODES (A.) SCANNED KEYBOARD MODE WITH 2 KEY LOCKOUT when a key is pressed ,it enters into FIFO (if at least 1 byte is free ),an interrupt is generated to inform CPU about previous key closure, if found no entry is made to the FIFO.If 2 keys are pressed no keys are detected or scanned. (B.) SCANNED KEYBOARD SPECIAL ERROR MODE Validity of this mode depends on N key rollover mode. when 2 keys are pressed simultaneously, error flag is set, it prevents further writing but sends interrupt to CPU for read operation. With command CF=1,error flag can be set. (C.) SENSOR MATRIX MODE debounce logic is inhibited.8 byte FIFO RAM acts as 8 x 8 bit memory matrix . sensor RAM contains status of sensor matrix.

Answer»

KEYBOARD MODES

(A.) SCANNED KEYBOARD MODE WITH 2 KEY LOCKOUT

when a key is pressed ,it enters into FIFO (if at least 1 byte is free ),an interrupt is generated to inform CPU about previous key closure, if found no entry is made to the FIFO.If 2 keys are pressed no keys are detected or scanned.

(B.) SCANNED KEYBOARD SPECIAL ERROR MODE

Validity of this mode depends on N key rollover mode. when 2 keys are pressed simultaneously, error flag is set, it prevents further writing but sends interrupt to CPU for read operation. With command CF=1,error flag can be set.

(C.) SENSOR MATRIX MODE

debounce logic is inhibited.8 byte FIFO RAM acts as 8 x 8 bit memory matrix .

sensor RAM contains status of sensor matrix.

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