8
DP-IF8000
2.2.2 System Control
• MICON-DSP period
Check the DSP_XCS (IC501-23pin), SCK (IC501-26pin), SDO
(IC501-24pin), and XHREQ (IC501-27pin).
The view after turning on the headphone power is shown in Fig. 29,
and the detailed timing is shown in Fig. 30.
Fig 29
DSP_XCS
SCK
SDO
XHREQ
Fig 30
DSP_XCS
SCK
(625kHz)
SDO
XHREQ
Start of 24 bit data transfer, at 2nd bit, HREQ
t
1
After transfer of 24 bit data, HREQ
t
0
• DIAT-MICON-DSP period
Check the DTQ (IC901-28pin), DSP_DTQ (IC501-28pin), ARDET
(IC901-27pin), DIAT_DTSEL (IC101-16pin).
Turn on the processor and set to Digital Input mode. Turn on the
headphone power, and apply an input source signal (any kind is
okay) to the processor.
The instant when switching from OFF to VIRTUAL FRONT using
the processor OUTPUT key is shown in Fig. 31.
The monitor view at the instant when switching from VIRTUAL
FRONT to VIRTUAL 5.1 or from VIRTUAL 5.1 to VIRTUAL 6.1
with the processor OUTPUT key is shown in Fig. 32.
The monitor view at the instant when switching from VIRTUAL
5.1 or VIRTUAL 6.1 to OFF with the processor OUTPUT key is
shown in Fig. 33.
*
1
DTQ
DSP_DTQ
ARDET
DIAT_DTSEL
Set DIAT receive
mode
*
3
Infrared unlock
(receive NG)
Infrared lock (receive OK)
Report lock to DPS
DSP identifies processor
transmit mode
*
2
1 Pulse output when set to DIAT receive mode.
3 Approximately 25 msec from lock report to DSP until DIAT
Fig 32
DTQ
DSP_DTQ
ARDET
DIAT_DTSEL
Fig 33
DTQ
DSP_DTQ
ARDET
DIAT_DTSEL
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