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Figure 7.5 Bit structure of back screen table data

■ Back screen table address register

Back screen table address register specifies the color mode of the back screen and the top address of the table. This is a write-only 32-bit register located at addresses 1800ACH to 1800AEH. The value is cleared to 0 after power-on or reset, so be sure to set it.

Back screen color mode bit : BACK color mode bit (BKCLMD), bit 15

Specify the color mode of the back screen.

BKCLMD Back screen color
0 Make a single color
1 Specify line by line

Back screen table address bit : BACK color table address bit (BKTA18 ~ BKTA0)
Specify the top address of the back screen table on VRAM.
BKTA18 to BKTA16 1800ACH bits 2 to 0 <
BKTA15 to BKTA0 1800AEH bits 15 to 0 :

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