VS1001K
VLSI
DATASHEET
y
Solution
9. WRITING SOFTWARE
9.5 System Vector Tags
The System Vector Tags are tags that may be replaced by the user to take control over several decoder
functions.
9.5.1 AudioInt, 0x4000..0x4001
Normally contains the following VS DSP assembly code:
j dac_int
stx mr1,(i6)+1 ; sty i7,(i6)
The user may, at will, replace the first instruction with either a or
command to gain control over
the audio interrupt. It is not recommended to change the instruction at 0x4001.
9.5.2 SpiInt, 0x4002..0x4003
Normally contains the following VS DSP assembly code:
j spi_int
stx mr1,(i6)+1 ; sty i7,(i6)
The user may, at will, replace the first address with either a j or jmpi command to gain control over the
SCI interrupt. It is not recommended to change the instruction at 0x4003.
9.5.3 DataInt, 0x4004..0x4005
Normally contains the following VS DSP assembly code:
j data_int
stx mr1,(i6)+1 ; sty i7,(i6)
The user may, at will, replace the first address with either a j or jmpi command to gain control over the
MP3 data interrupt. It is not recommended to change the instruction at 0x4005.
9.5.4 UserCodec, 0x4008..0x4009
Normally contains the following VS DSP assembly code:
jr
nop
Version 4.11, 2003-09-18
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ETC [ ETC ]
