datasheetbank_Logo
Integrated circuits, Transistor, Semiconductors Search and Datasheet PDF Download Site

LC78681KE-L View Datasheet(PDF) - SANYO -> Panasonic

Part Name
Description
View to exact match
LC78681KE-L Datasheet PDF : 24 Pages
First Prev 11 12 13 14 15 16 17 18 19 20 Next Last
LC78681KE, 78681KE-L
Level meter (LVM)
The LVM set (2CH) command sets the LC78681KE to LVM mode.
LVM data is a 16-bit word in which the MSB indicates the L/R polarity and the low order 15 bits are absolute
value data. A one in the MSB indicates left channel data and a zero indicates right channel data.
LVM data is appended after the 80 bits of SubQ data, and can be read out from the SQOUT pin by applying 96
clock cycles to the CQCK pin. Each time LVM data is read out the left/right channel state is inverted. Data is
held independently for both the left and right channels. In particular, the largest value that occurs between
readouts for each channel is held.
Peak meter (PKM)
The PKM set (2BH) command sets the LC78681KE to PKM mode.
PKM data is a 16-bit word in which the MSB is always zero and the low order 15 bits are absolute value data.
This functions detects the maximum value that occurs in the data, whichever channel that value occurs in.
PKM data is read out in the same manner as LVM data. However, data is not updated as a result of the readout
operation.
PKM mode SubQ data absolute time is computed by holding the absolute time (ATIME) detected after the
maximum value occurred and sending that value. (Normal operation uses relative time.)
It is possible to set the LC78681KE to ignore values larger than the already recorded value by issuing the PKM
mask set command, even in PKM mode. This function is cleared by issuing a PKM mask reset command. (This
is used in PK search in a memory track.)
13. Mute control circuit
MSB
LSB
00000001
00000010
00000011
Command
MUTE: 0 dB
MUTE: 12 dB
MUTE: dB
RES = low
An attenuation of 12 dB (MUTE 12 dB) or full muting (MUTE dB) can be applied by issuing the appropriate
command from the table. Since zero cross muting is used, there is no noise associated with this function. Zero cross
is defined for this function as the top seven bits being all ones or all zeros.
14. Bilingual function
MSB
LSB
00101000
00101001
00101010
Command
STO CONT
Lch CONT
Rch CONT
RES = low
Following a reset or when a stereo (28H) command has been issued, the left and right channel data is output to the
left and right channels respectively.
When an Lch set (29H) command is issued, the left and right channels both output the left channel data.
When an Rch set (2AH) command is issued, the left and right channels both output the right channel data.
15. De-emphasis on/off; Pin 29: EMPH
The preemphasis on/off bit in subcode Q control information is output from the EMPH pin. De-emphasis should be
performed when this signal is high.
No. 4969-18/24
 

Share Link: 

datasheetbank.com [ Privacy Policy ] [ Request Datasheet ] [ Contact Us ]