No. 7142-21/43

LC75816E, 75816W

Output Data

• KD1 to KD30 : Key data

When a key matrix of up to 30 keys is formed from the KS1 to KS6 output pins and the KI1 to KI5 input pins and one

of those keys is pressed, the key output data corresponding to that key will be set to 1. The table shows the relationship

between those pins and the key data bits.

When the KS1/P1 and KS2/P2 output pins are set to function as general-purpose output ports with the "set key scan

output port/general-purpose output port state" instruction and a key matrix of up to 20 keys is formed from the KS3 to

KS6 output pins and the KI1 to KI5 input pins, the KD1 to KD10 key data bits will be set to 0.

• SA : Sleep acknowledge data

This output data bit is set to the state when the key was pressed. Also, while DO will be low in this case, if serial data is

input and the mode is set (to normal or sleep mode) during this period, that mode will be set. SA will be 1 in sleep

mode and 0 in normal mode.

KI1

KI2

KI3

KI4

KI5

KS1/P1

KD1

KD2

KD3

KD4

KD5

KS2/P2

KD6

KD7

KD8

KD9

KD10

KS3

KD11

KD12

KD13

KD14

KD15

KS4

KD16

KD17

KD18

KD19

KD20

KS5

KD21

KD22

KD23

KD24

KD25

KS6

KD26

KD27

KD28

KD29

KD30