R8A77850ANBGV Renesas Electronics America, R8A77850ANBGV Datasheet - Page 1058
R8A77850ANBGV
Manufacturer Part Number
R8A77850ANBGV
Description
IC SUPERH MPU ROMLESS 436-BGA
Manufacturer
Renesas Electronics America
Series
SuperH® SH7780r
Datasheet
1.R8A77850AADBGV.pdf
(1694 pages)
Specifications of R8A77850ANBGV
Core Processor
SH-4A
Core Size
32-Bit
Speed
600MHz
Connectivity
Audio Codec, MMC, Serial Sound, SCI, SIO, SPI, SSI
Peripherals
DMA, POR, WDT
Number Of I /o
108
Program Memory Type
ROMless
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
1 V ~ 1.2 V
Oscillator Type
External
Operating Temperature
-20°C ~ 75°C
Package / Case
436-BGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
R8A77850ANBGV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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20. Graphics Data Translation Accelerator (GDTA)
Rev.1.00 Jan. 10, 2008 Page 1026 of 1658
REJ09B0261-0100
No. Operation
(6) Half-pixel
correction
processing
Description
Half-pixel correction processing is performed for the data read in (5).
(For the Y pointer: 16 to the right and 16 downward in 4 pixel units, for a total
of 256 processed)
* The Recon_down value is used to perform half-pixel correction even/odd
Formulae for each correction case at "Input data for one macroblock" in figure
20.6 are as follows.
Correction case 1: right = even, down = even
-> (A + A + 1)/2 = A (digits below the decimal point are discarded (no
change))
Correction case 2: right = even, down = odd
-> (A + C + 1)/2 = A' (digits below the decimal point are discarded)
Correction case 3: right = odd, down = even
-> (A + B + 1)/2 = A' (digits below the decimal point are discarded)
Correction case 4: right = odd, down = odd
-> (A + D + B + C + 2)/4 = A' (digits below the decimal point are discarded)
In bidirectional macroblock processing, the result of computation of the
following formula using past data after half-pixel correction and future data
after half-pixel correction is taken to be the half-pixel correction result, and
computation processing with IDCT data is performed.
(past data after half-pixel correction + future data after half-pixel correction
+1)/2 = half-pixel correction result
There are cases in which, due to the settings, input macroblock data is not
within the padding area and the data exceeds the screen height (invalid
image data), but the hardware performs processing without modification.
Recon_down -6
Y even/odd
U/V
even/odd
decisions. Decision results are as follows.
(The Recon_right value is similarly used to perform half-pixel correction
even/odd decisions.)
even odd even odd even odd even odd even odd even odd even
odd even even odd odd even even even odd odd even even odd
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
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