BU97501KV Datasheet, PDF (10/33 Pages) Rohm – Integrated RAM for display data

BU97501KV
Serial Data Output
Datasheet
Figure 9. Serial Data Output
KD1 to KD30: Key Data
SA: Sleep Acknowledge Data
Key Data Read Command (KEY RD): 1000_0101
(Note7) If a key data operation is executed when DO is high, the read key data (KD1 to KD30) and sleep acknowledge data(SA) will be invalid.
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
SA: Sleep Acknowledge Data
This output data is used to set the state when the key is pressed. In this case, DO will go to the low level. If serial data is
input during this period and the mode is set (normal mode or sleep mode), the IC will be set to that mode. SA is set to 0
in the sleep mode and to 1 in the normal mode.
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11.Apr.2014 Rev.004