Data Sheet S14074EJ1V0DS

6

µµµµPD16315

5. KEY MATRIX AND KEY-INPUT DATA STORAGE RAM

The key matrix is made up of a 16 x 2 matrix, as shown below.

The data of each key is stored as follows, and is read with the read command starting from the least significant bit.

Reading Sequence

b0

b1

b2

b3

b4

b5

b6

b7

5.1 LED Port

Data is written to the LED port with the write command, starting from the least significant bit. “L” output when the bit of this

port is 0, and “H” output when the bit is 1. The data of bits after the 5th bit are ignored.

MSB

LSB

b3 b2 b1 b0

−−

−

−

Don't care

Remark Power ON application, all the LED ports are “L” output.