NX5850 Datasheet, PDF (94/152 Pages) List of Unclassifed Manufacturers – Digital Audio SoC

NX5850
Digital Audio SoC
Preliminary
DRM_INT : This bit is used to DRM interrupt enable.
0 : Disable.
1 : Enable.
DRM Interrupt Status (DRM_INT_STA, 0xF91a) : Read / Write
7
6
5
4
3
2
Reserved
1
0
INT_STA
If calculation is completed, interrupt is generated and this bit becomes 1 to indicate interrupt generation.
Writing 1 clears this bit.
INT_STA : This bit is used to check the DRM interrupt.
0 : No interrupt is generated.
1 : Interrupt is generated.
DRM Command Register (DRM_CMD_REG, 0xF91b) : Read / Write
7
WR_EN
6
RD_EN
5
4
ATM_COD
3
2
DAT_TAG_SEL
1
0
DAT_SRC_SEL
This register is cleared at the end of calculation. DMA data transfer is done by predefined format.
WR_EN : This bit is used to DMA data register write enable.
0 : no operation.
1 : before calculation, register data are written by DMA operation.
RD_EN : This bit is used to DMA data register read enable.
0 : no operation.
1 : after calculation, register data are read by DMA operation.
ATM_COD : These bits are used to arithmetic code mode select.
00 : No operation.
01 : Modular addition.
10 : Modular subtract.
11 : modular multiplication.
No operation : No Change.
Modular addition : P and Y is added and then save result to P and X register. No change in Y and M
register.
Modular subtract : P minus Y is done and then save result to P and X register. No change in Y and M
register.
Modular multiplication : multiply X and Y and then save result to P and X register.
DAT_TAG_SEL : These bits are used to select DMA target register.
00 : P
01 : Y
10 : M
11 : X
DAT_SRC_SEL : These bits are used to select DMA source register.
00 : P
01 : Y
10 : M
11 : X
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