SM8521 Datasheet, PDF (39/56 Pages) Sharp Electrionic Components – 8-Bit Single-Chip Microcomputer

How to overturn a character in right and left.
4-dot data is transfered as a unit, from ROM to
VRAM or VRAM to VRAM. ROM is composed of 8
ROM
Bit 7
0
dot3
dot2
dot1
dot0
SM8521
bits.
In case of "Increment x" is effective, 8-bit data is
transfered as shown below.
VRAM
Bit 7
0
dot3
dot2
dot1
dot0
On the other hand, in case of "Decrement x" is
effective, 8-bit data is transferred as shown below.
ROM
Bit 7
0
dot3
dot2
dot1
dot0
In each 4-dot data is automatically swapped in right
and left.
VRAM
Bit 7
0
dot0
dot1
dot2
dot3
Position of all specified dots, maximun 256, is
overturned with right and left in horizontal. The
heart of their X coordinates becomes an axis of
symmetry.
DMX1 (Source X-coordinate register)
Bit 7
0
DMX17 DMX16 DMX15 DMX14 DMX13 DMX12 DMX11 DMX10
DMY1 (Source Y-coordinate register)
Bit 7
0
DMY17 DMY16 DMY15 DMY14 DMY13 DMY12 DMY11 DMY10
DMDX (X-width register (X-width-1))
Bit 7
0
DMDX7 DMDX6 DMDX5 DMDX4 DMDX3 DMDX2 DMDX1 DMDX0
DMDY (Y-width register (Y-width-1))
Bit 7
0
DMDY7 DMDY6 DMDY5 DMDY4 DMDY3 DMDY2 DMDY1 DMDY0
DMX2 (Destination X-coordinate register)
Bit 7
0
DMX27 DMX26 DMX25 DMX24 DMX23 DMX22 DMX21 DMX20
DMY2 (Destination Y-coordinate register)
Bit 7
0
DMY27 DMY26 DMY25 DMY24 DMY23 DMY22 DMY21 DMY20
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