Cypress S6J3200 Series, Руководство пользователя

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CHAPTER 28:LCD Controller
1066 S6J3200 Series Hardware Manual Document Number: 002-04852 Rev. *G
The key code setting becomes invalid immediately upon any writing to these bits in a different
order. In such cases, you need to set the key codes again from the beginning.
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You need to write the same pair of values to SIZE [1:0] and ADR [11:0] 4 times when writing data
to KEY [1:0] 4 times.
The key code setting becomes invalid upon any writing of a different pair of values. In such cases,
you need to set the key codes again from the beginning.
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When the KEYCDR register is read during writing to KEY [1:0], the key code setting becomes
invalid. In such cases, you need to set the key codes again from the beginning.
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When access to the address set in ADR [11:0] occurs during writing to KEY [1:0], the key code
setting becomes invalid. In such cases, you need to set the key codes again from the beginning.
When access to any register other than the above occurs, the key code setting does not become
invalid.
Writing the remaining data to KEY [1:0] subsequently makes the key code setting valid.
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Once the address set in KEYCDR: ADR [11:0] is accessed after KEY [1:0] is set normally,
it is required to set the key codes again to access the address again.