LC75817E Datasheet, PDF (21/43 Pages) Sanyo Semicon Device – 1/8 to 1/10 Duty Dot Matrix LCD Display Controller/Driver with Key Input Function

LC75817E, 75817W
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.
KI1
KI2
KI3
KI4
KI5
KS1
KD1
KD2
KD3
KD4
KD5
KS2
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
When the states of the KS1 to KS6 output pins during key scan standby are set to low for KS1 and KS2 and to high for
KS3 to KS6 with the “set key scan output 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.
No. 6144-21/43