M30800MC Datasheet, PDF (176/317 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

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M16C/80
SINGLE-CHIP
Mitsubishi microcomputers
(100-pin version) group
16-BIT CMOS MICROCOMPUTER
X-Y Converter
X-Y conversion rotates the 16 x 16 matrix data by 90 degrees. It can also be used to invert the top and
bottom of the 16-bit data. Figure 1.24.1 shows the XY control register.
The Xi and the Yi registers are 16-bit registers. There are 16 of each (where i= 0 to 15).
The Xi and Yi registers are mapped to the same address. The Xi register is a write-only register, while the
Yi register is a read-only register. Be sure to access the Xi and Yi registers in 16-bit units from an even
address. Operation cannot be guaranteed if you attempt to access these registers in 8-bit units.
XY control register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
XYC
Address
02E016
When reset
XXXXXX002
Bit symbol
Bit name
XYC0
Read-mode set bit
Function
0 : Data conversion
1 : No data conversion
XYC1
Write-mode set bit
0 : No bit mapping conversion
1 : Bit mapping conversion
Nothing is assigned.
When write, set "0". When read, the value of these bits is indeterminate.
RW
Figure 1.24.1. XY control register
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