89
Sirius-PJ1Training
Slide 89
Audio Input/Output Processing
IC2203
SiI9127
HDMI Receiver
(with HDCP)
(with PnP)
IC2404
VPP1101
Display Port
Receiver
(with HDCP)
IC2801
EP3C16F484C8N
SyncDet(FPGA)
I2C
COMPUTER1(M5401)
COMPUTER2(M5402)
HDMI IN (M2201)
Display Port IN (M2401)
IC5202
TLV320DAC32
Audio DAC
IC5401
NJW1190
Audio
Processor
IC4001
SH7670
CPU
I2C
COMPUTER3(M1002)
VIDEO(M1005)
AUDIO OUT(M1004)
IC9201
i.MX515
MM CPU
POIO2
POMM
POIO1
MM_P_PWB
IO_PWB
I2S
I2S
I2S
I2C
IC1201
Audio AMP
10W
SPEAKER
POEX
POSP
EX_PWB
MAIN_PWB
Local BUS
IC4703
Buffer
IC 4502
TightCell2
Gate Array
Audio Souse
BEEP
The audio signals which are input from COMPUTER 1 (M5401), COMPUTER 2
(M5402), COMPUTER 3 (M1002), and VIDEO (M1005) are input to the Audio
Processor IC (IC5401).
The audio signals of HDMI and Display Port are output from each Receiver IC
(IC2203/2404) in I2S (MCLK/BCLK/WCLK/DO), and once input to SyncDet
(IC2801). Then only the I2S of the terminal selected by the projector menu is
output. The output I2S is Wired OR with I2S output from the MM board and input
to DAC (IC5202). The D/A conversion is processed with this audio DAC and
input to the audio processor IC.
In the audio processor IC, only the audio signal from the selected terminal by the
projector menu is output. Then L/R signal multiple processing is performed and
input to the audio amplifier (IC1201). Then after amplification, the signal is output
from the monaural speaker (8
Ω
) (MAX: 10W).
When a cable is connected to the Audio Out terminal, the speaker will be muted,
and only the L/R signal which is output from the audio processor IC will be output
to the Audio Out terminal.
The audio output is possible when Standby Mode of the projector is set to
Normal. However, when Power-Saving or Network Standby is selected, the
output is not enabled when the status is changed to their Standby Mode.
The VOLUME control is performed by controlling the audio processor IC from
CPU (IC4001) via I2C.
This projector is equipped with a beep function on start-up or key operation. The
beeping is achieved by the multiple processing of PWM output of the TightCell2
(IC4502) connected to the Local BUS of the CPU with the audio amplifier input.
