ta1304f TOSHIBA Semiconductor CORPORATION, ta1304f Datasheet - Page 10

• Manufacturer Part Number: ta1304f
• Description: Tv-sound Processor
• Manufacturer: TOSHIBA Semiconductor CORPORATION

l Input attenuation control (Sub address 03 (h) / b2)
l ALS switch (Sub address 03 (h) / b6), ALS start point (Sub address 03 (h) / b5~b4)
l Test switch (Sub address 03 (h) / b7)
l Port 3 control (Sub address 06 (h) / b3), Port 4 control (Sub address 06 (h) / b5~b4)
l Mute 1 (Sub address 07 (h) / b0), Mute 2 (Sub address 07 (h) / b1)
When this function is active, Input signals are ï5 dB attenuated at input stage of L-ch and R-ch. W-ch signal
isn't attenuated. So, W-ch output level is up to 8 dB from L-ch and R-ch outputs relatively.
Set the bit to 0 (b), attenuation is inactive, set the bit to 1 (b), attenuation is active.
Switch on default data is 0 (b).
When bass boost function (addition woofer ch signal to main ch signals) is active, output signals are distort
when the signals are over the dynamic range of the circuits. ALS (Automatic Level Suppressor) suppresses
W-ch signal level under ALS strat point, reduces the distortion in large signals input condition.
Set the bit (Sub address 03 (h) / b6) to 0 (b), ALS is inactive. Set the bit to 1 (b), ALS is active.
Switch on default data is 0 (b).
The bits of 03 (h) / b5~b4 set ALS start point. Set the bits to 00 (b), ALS start point is 180 mV
bits to 01 (b), ALS start point is 310 mV
bits to 11 (b), ALS start point is 630 mV
Switch on default data is 00 (b).
This bit is for IC testing. So this bit must be set to 0 (b).
Switch on default data is 0 (b).
The IC, e.g. sound demltiplexer, which isn’t avarailable I
TA1304F.
Port 3 is open-collector type output. Set the bit to 0 (b), port3 is on. Set the bit to 1 (b), port3 is off.
Switch on default data 0 (b).
Port 4 is emitter-follower type output. It can output 3 levels. Set the bits to 00 (b) or 10 (b), port 4 outputs 0
V. Set to 01 (b), port 4 outputs 2.5 V. Set to 11 (b), port 4 outputs 5 V.
Switch on default data is 00 (h).
When Mute 1 is active, all outputs are muted. Set the bit to 0 (b), Mute 1 is inactive. Set the bit to 1 (b),
Mute 1 is active.
Switch on default data is 0 (b).
When Mute 2 is active, only W-ch output is muted. Set the bit to 0 (b), Mute 2 is inactive. Set the bit to 1 (b),
Mute 2 is active.
Switch on default data is 0 (b).
rms
rms
.
. Set the bits to 10 (b), ALS start point is 430 mV
2
C Bus, can be controlled by I
2001-02-16 10/31
2
C Bus through
TA1304F/N
rms
rms
. And set the
. Set the