Analog Devices ADSP-SC58 Series Hardware Reference Manual page 885

EPPI Mode Configuration
Table 18-32: 16-bit Transmit Mode with Packing Enabled
DMA Data (32 bits)
0x1111 2222
0x3333 4444
Table 18-33: 16-bit Transmit Mode with Packing Disabled
DMA Data (16 bits)
0x1234
0x2345
0x3456
Configuring 18-Bit Transmit Mode
For 18-bit transmit mode, if the EPPI_CTL.PACKEN bit =1, the DMA is a 32-bit DMA and the EPPI unpacks
the 32-bit word from memory. In this mode, when EPPI_CTL.RGBFMTEN is set, the least significant 2 bits of R,
G, and B are dropped.
Table 18-34: 18-bit Transmit Mode with Packing Enabled
DMA Data
0x0123 4567
0x89AB CDEF
0x0123 4567
Table 18-35: 18-bit Transmit Mode with Packing Disabled
DMA Data
0x0123 4567
0x89AB CDEF
0x0123 4567
Configuring 8-Bit Split Transmit Mode
For 8-bit split transmit mode, the EPPI_CTL.PACKEN bit is not valid. The EPPI always unpacks the 32-bit
DMA data into 4 bytes to transmit.
18–46
Pin Data when SWAPEN=0
0x2222
0x1111
0x4444
0x3333
Pin Data SWAPEN=X
0x1234
0x2345
0x3456
Pin Data (18-bits)
RGBFMTEN=0
0x3 4567
0x1 EF01
0x3 89AB
0x1 2345
Pin Data (18-bits)
RGBFMTEN=0
0x3 4567
0x3 CDEF
0x3 4567
ADSP-SC58x/ADSP-2158x SHARC+ Processor Hardware Reference
Pin Data when SWAPEN=1
0x1111
0x2222
0x3333
0x4444
RGBFMTEN=1
0x0 8459
0x3 3EC0
0x1 98AA
0x0 0211
RGBFMTEN=1
0x0 8459
0x2 ACFB
0x0 8459