yac526 Yamatake Corporation, yac526 Datasheet - Page 6

• Manufacturer Part Number: yac526
• Description: Electric Variable Resistance
• Manufacturer: Yamatake Corporation

・Zero-cross mode
・Volume setting
・Power on reset
6
(Zero-cross
mode A, B)
(Zero-cross
mode C)
Volume value
Volume value
※Be careful not to change the zero-cross mode during the operation of the device, or an erroneous operation
YAC526 incorporates the zero-cross detection function to suppress audible noise when the volume is changed
quickly. A mode is selected from the following four modes by setting ZCEN1 and 2 pins.
The relationship between input code and volume value is as shown in the following table. (As for an input code,
the left serves as MSB.)
YAC526 builds in the power on reset function that resets the volume value when the power is turned on. Since a
system that perform the reset by detecting the power supply voltage level, when turning on the power supply
again, do it after the power supply voltage AVDD and AVSS has reduced sufficiently (to +1.0V/ -1.0V or less).
Moreover, although a volume register is reset at the time of a power supply injection, since shocking sound occurs
in the case of power supply ON/OFF, please apply mute to the whole set.
may be caused. Perform change of zero-cross mode after the elapse of 1 second or more from the rising of
CSN signal.
ZCEN[2:1]
00
01
10
11
SDATAI
CSN
Normal
Zero-cross mode A
Zero-cross mode B
Zero-cross mode C
The input codes ALL"0" and ALL"1" are set for mute.
-15dB(Last value)
-12dB
Input code
11111111
11111110
・
・
11011111
・
・
10111111
・
・
00000010
00000001
00000000
Mode
Operation in each zero-cross mode when zero-cross is not detected
No zero-cross
t < t
&
TM
-9dB
Zero-cross is not detected, and the volume value is changed
immediately after the rising of CSN.
Zero-cross is detected after the rising of CSN, or after t
passes, volume value is changed.
Zero-cross is detected after the rising of CSN, or after t
passes, volume value is changed.
When the next data is written within t
A, the changed is performed at the falling of CSN by using the volume
value immediately before.
-12dB
No zero-cross
t < t
Gain or attenuate(dB)
&
TM
-15dB(Last value)
-6dB
MUTE
+31.5
・
・
+16.0
・
・
0
・
・
-94.5
-95.0
MUTE
-9dB
No zero-cross
t < t
&
TM
Operation
-3dB
TM1
-6dB
No zero-cross
t < t
(20ms) for zero-cross mode
&
TM
YAC526
0dB
-3dB
TM1
TM2
t
≧
(20ms)
(10ms)
t
TM
0dB
0dB