CXD1199AQ
2-1-1. CONFIG1 (configuration 1) register
This register is set depending on the IC peripheral hardware. The sub CPU sets this register after the IC has
been reset.
bit 7 : Reserved
Normally set low.
bit 6 : XSLOW
The number of clock signals per DMA cycle is determined by this bit.
High : 4 clock signals
Low : 12 clock signals
Set low when a low-speed SRAM is connected for VDD = 3.5 V. When XSLOW is low, erasure
correction and double speed playback are prohibited.
bit 5 : PRTYCTL (priority control)
Set high when double speed playback with erasure correction executed is performed by setting the
clock frequency of the CD-ROM decoder to 18 MHz or below. In this case, buffer access for ECC
has priority and the rate of data transfer to the host is reduced.
When a 9-bit/word SRAM has been connected to this IC, the C2 pointer is written from the BDBP
pin into the buffer memory regardless of this bit value.
bits 4, 3 : RAMSZ1, 0 (RAM size 1, 0)
bit 2 : 9 BITRAM
These bits are set depending on the size of the SRAM connected to the IC.
RAMSZ1
“L”
RAMSZ0
“L”
9 BITRAM
SRAM size
32 Kw × 8b
32 Kw × 9b
64 Kw × 8b
64 Kw × 9b
128 Kw × 8b
128 Kw × 9b
“L”
“H”
“L”
“H”
“L”
“H”
“L”
“L”
“L”
“H”
“L”
“H”
“H”
“L”
“H”
“L”
bit 1 : CLKDIS (CLK disable)
High : The CLK pin is fixed low.
Low : A 16.9344 MHz clock signal is output from the CLK pin.
bit 0 : HCLKDIS (half CLK disable)
High : The HCLK pin is fixed low.
Low : An 8.4672 MHz clock signal is output from the HCLK pin.
2-1-3. CONFIG2 (configuration 2) register
This register is set depending on the IC peripheral hardware. The sub CPU sets this register after the IC has
been reset.
bits 7, 6 : Reserved
Normally set low.
bit 5 : SPECTL (sound parameter error control)
bit 4 : SPMCTL (sound parameter majority control)
These two bits control the processing of the sound parameters for ADPCM decoding playback.
bit 3 : SMBF2 (sound map buffer 2)
Indicates the number of buffer surfaces for the sound map ADPCM.
High : 2 buffer surfaces for the sound map
Low : 3 buffer surfaces for the sound map
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SONY [ SONY CORPORATION ]
