YSS943 YAMAHA [YAMAHA CORPORATION], YSS943 Datasheet - Page 25

• Manufacturer Part Number: YSS943
• Description: ADAMB Advanced Digital Audio Multi channel decode processor
• Manufacturer: YAMAHA [YAMAHA CORPORATION]

YSS944/943/940
(5) AC Characteristics
1) At power-on
2) In normal operation mode
(a) Power up, Hardware Reset, and clock
Note 1) When using recommended XI input and recommended PLL setting. The internal operating clock
Note 2) When Shortcut key barrier diode is not connected
Note 3) When Shortcut key barrier diode is connected
Note 4) The time interval of power ON or OFF between 3.3V power supply and 1.2V power supply must
No.
1
2
3
4
5
6
• If a crystal oscillator is connected, this includes the time between power supply stabilization and
• Turn on the power when nIC is at low level.
• The XI input and power supply must be stabilized.
• If XI oscillation has stopped during initialization in power-down mode, time is required to stabilize
nIC time 1
nIC time 2
XI clock frequency
XI clock duty
Internal operating
clock cycle
Power ON time
frequency is 178.176 MHz.
The 3.3 V power supply (VDD1, AVDDR, AHVDD, and AHVDDG) should be started before the
1.2 V power supply (VDD2 and DVDD).
Insert a Shortcut key barrier diode with forward voltage of 0.4 V or less between the 3.3 V power
supply (VDD1, AVDDR, AHVDD, and AHVDDG) and 1.2 V power supply (VDD2 and DVDD)
(cathode is VDD1 and anode is VDD2).
The 3.3 V power supply and 1.2 V power supply can be started in either order.
be within one second. Only one power keep on supplying, LSI would be damaged.
oscillator stabilization.
the oscillation.
Parameter
AHVDD, AHVDDG
VDD1, AVDDR,
nIC
VDD2,
DVDD
nIC
XI
Symbol
X
T
T
T
T
f
DUTY
V1V2
XIN
CLK
IC1
IC2
6
Figure 1) below
Figure 2) below
Condition
Note 1)
Note 2)
Note 3)
1
2
Min.
40
5
1
0
1
1000/178.176
12.288
Typ.
Max.
60
1
1
MHz
Unit
ms
µ s
ns
%
s
s
25