Cypress S6J3200 Series, Руководство пользователя

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CHAPTER 28:LCD Controller
S6J3200 Series Hardware Manual Document Number: 002-04852 Rev. *G 1065
[bit31:30] KEY1 to KEY0: Key code setting bits
You need to write "00", "01", "10", and "11" continuously to these bits in this order.
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.
Bit31:30 Description
0 0 1st key code
0 1 2nd key code
1 0 3rd key code
1 1 4th key code
[bit29:28] SIZE [1:0]: Access size setting bits
These bits set the access size for writing to a key code target register.
Write the same data to these bits when writing the key codes of "00", "01", "10", and "11" to KEY [1:0] in
this order.
Bit29:28 Description
0 0 Set byte access.
0 1 Set half-word access.
1 0 Set word access.
1 1 Reserved
[bit27:12] Reserved
Always write "0" to these bits.
[bit11:0] ADR11 to ADR0: Address specification bits
These bits set the lower 12 bits of the address of a key code target register. Write the same data to
these bits when writing the key codes of "00", "01", "10", and "11" to KEY [1:0] in this order.
Bit11:0 Description
Set the lower 12 bits of the address of a key code target register.
Notes:
The following are the notes on key code setting.
−
You need to write "00", "01", "10", and "11" continuously to KEY [1:0] in this order in 4 write
operations.