SM5816AF_06 Datasheet, PDF (19/27 Pages) Nippon Precision Circuits Inc – 6-channel DSD-PCM Converter

SM5816AF
Dither Rounding Function
In 8fs PCM output mode with 24-bit right-justified format only, a dither function (TPDF)* can be added to the
output. The dither ON/OFF and rounding bit position are set by SELDH1 and SELDH2. After the initial setting
is made, rounded data is output 2 words later.
*: Triangular Probability Density Function
SELDH2
L
L
H
H
SELDH1
L
H
L
H
Function
Dither OFF
Dither ON: 1 LSB (Bit 0)
Dither ON: 2 LSB (Bit 1)
Dither ON: 4 LSB (Bit 2)
Mute Function
The DSD outputs and PCM outputs can be muted independently. Muting is applied directly to the outputs.
(1) DSD mute
The DSD outputs are directly muted by a 50% duty (55h) pattern.
XMTDSD = “L” : all DSD outputs with muting ON
XMTDSD = “H” : all DSD outputs with muting OFF
(2) PCM mute
The PCM outputs are directly muted with value “0”.
XMTPCM = “L” : all PCM outputs muting ON
XMTPCM = “H” : all PCM outputs muting OFF
Monitor Function
The internal status changes can be monitored using the monitor pin. The MONTOR pin goes HIGH whenever
any of the following parameter conditions occur.
I SEL8FS changes state
I SELEXT changes state
I SELRAM, SELFIR1, 2 changes state
The MONTOR pin is reset to LOW using the INIT or SYNC inputs.
SEIKO NPC CORPORATION —19