NJU26123V NJRC [New Japan Radio], NJU26123V Datasheet - Page 17

• Manufacturer Part Number: NJU26123V
• Description: Digital Signal Processor for TV
• Manufacturer: NJRC [New Japan Radio]

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Note: If input and output of an audio signal stop and an audio interface stops, WDC can’t output.
Ver.2008-04-17
Pin setting
WatchDog Clock
The NJU26123 operates default command setting after resetting the NJU26123. In addition, the NJU26123
restricts operation at power on by setting PROC pin (No.17) (Table 15). This pin is input pin. However, this pin
operates as bi-directional pin. Connect with V
Table 15
The NJU26123 outputs clock pulse through WDC (No.18) pin during normal operation.
The NJU26123 generates a clock pulse through the WDC terminal after resetting the NJU26123. The WDC
clock is useful to check the status of the NJU26123 operation. For example, a microcomputer monitors the
WDC clock and checks the status of the NJU26123. When the WDC clock pulse is lost or not normal clock cycle,
the NJU26123 does not operate correctly. Then reset the NJU26123 and set up the NJU26123 again.
Watchdog clock output cycle is about 170msec.
That is because it has controlled based on the signal of an audio interface.
Pin No. Symbol
17
PROC
Pin setting
Setting
“High”
“Low”
Function
The NJU26123 does not operate after reset. Sending start
command is required for starting operation.
The NJU26123 operates default setting after reset. The default
value of Master Volume is Mute.
DD
or V
SS
through 3.3k
Ω
resistance.
NJU26123
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