20. Graphics Data Translation Accelerator (GDTA)
Rev.1.00 Jan. 10, 2008 Page 1029 of 1658
REJ09B0261-0100
20.5
Interrupt Processing
In the GDTA, there are four types of interrupt sources. There are three interrupt flags for CL
processing end, MC processing end, and CL/MC errors, used to identify interrupt sources. The
interrupt enable bit allows generation of interrupt requests.
CL errors and MC errors use a common GAERI interrupt.
Table 20.10 GDTA Interrupt Request
Interrupt Source
Interrupt Flag
Enable Bit
Description
CL_END interrupt
CL_END
CL_ENEN
CL processing ended
MC_END interrupt
MC_END
MC_ENEN
MC processing ended
CL_ERR interrupt
CL_ERR or MC_ERR
CL_EREN
CL error occurred
MC_ERR interrupt
MC_EREN
MC error occurred
20.6
Data Alignment
The GDTA performs data alignment conversion of input data, output data, and RAM 0/1 data
using an endian signal (pin MD8) or using GDTA internal registers.
Table 20.11 shows the correspondence between data alignment conversion patterns and the
settings of DRCL_CTL, DWCL_CTL, DRMC_CTL, DWMC_CTL, DCP_CTL, and DID_CTL.
Table 20.11 GDTA Data Alignment Conversion
DTAM
DTSA
DTUA
Little (MD8)
Data Alignment Conversion Pattern Remarks
0
H'00 H'00 0
CP3
(2)
0
H'00 H'00 1
CP3
(1)
1 H'00
H'00
*
CP3 (2)
1 H'01
H'01
*
CP1
(1)
1 H'01
H'10
*
CP2
(1)
1 H'01
H'11
*
CP3
(1)
1 H'10
H'01
*
CP1
(2)
1 H'10
H'10
*
CP2
(2)
1 H'11
H'01
*
CP1
(3)
Note:
*
For the data alignment pattern numbers, refer to figure 20.8.
Содержание SH7781
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