r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1052
r8a77850anbg
Manufacturer Part Number
r8a77850anbg
Description
Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R8A77850ANBG.pdf
(1692 pages)
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20. Graphics Data Translation Accelerator (GDTA)
Rev.1.00 Jan. 10, 2008 Page 1022 of 1658
REJ09B0261-0100
No. Operation
(2) Calculation of
output position
(nth row and
below)
Description
The following formulae are used to compute output positions (nth row and
below) (DDR2-SDRAM output address).
Output address formulae for nth row and below
•
Subsequently, data for 16 dots (= 16 bytes) is processed in succession
•
Subsequently, data for 8 dots (= 8 bytes) is processed in succession
V pointer address is calculated using a formula similar to that for the U pointer
address.
Y output target address
Calculation formula: Output frame Y point value (base point) + [(mbrow ×
16 + n - 1) × (width + Y padding)] + [mbcol × 16]
Output frame Y pointer value (base point): MCOYPR setting address
mbrow: Calculated from MCCF setting
mbcol: Calculated from MCCF setting
width: Calculated from MCWR setting
Y padding: Calculated from MCYPR setting
U/V output target address
Calculation formula: Output frame U point value (base point) + [(mbrow ×
8 + n - 1) × (width/2 + U padding)] + [mbcol × 8]
Output frame U pointer value (base point): MCOUPR setting address
mbrow: Calculated from MCCF setting
mbcol: Calculated from MCCF setting
width: Calculated from MCWR setting
U padding: Calculated from MCUVPR setting
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