BU7839GVW_10 Datasheet, PDF (8/16 Pages) Rohm – Digital Input Class-D Headphone Amplifier

BU7839GVW
Technical Note
●DC characteristic
Ta=25degree,DVDD=DVDDIO=1.5V, VDD_R=VDD_L=PLLVDD=2.8V
Standardized values
Item
Symbol
Unit
MIN
TYP
MAX
Input ’H’ Level
Input ’L’ Level
Output ’H’ Level
Output ’L’ Level 1
Output ’L’ Level 2
(SDA terminal)
VIH
0.7x
DVDDIO
-
-
V
VIL
-
-
0.3x
DVDDIO
V
VOH
0.8x
DVDDIO
-
-
V
VOL1
-
-
0.2x
DVDDIO
V
VOL2
-
-
0.2x
DVDDIO
V
Table 10 DC characteristic
●2wire CPU I/F Part
Note
Io=-1mA
Io=1mA
Io=3mA
Device address is "0110011"(33h) or "0110110"(36h), i.e. 33h when ADR terminal is L or 36h when ADR terminal is H.
Please don’t switch the ADR terminal while 2wire CPU I/F is operating.
The transmission rate is compatible with a maximum of 400kbps
2wire CPU I/F device address
ADR
W/R
A7 A6 A5 A4 A3 A2 A1
0
0110011
0/1
1
0110110
0/1
・Bit transmission
The data of 1bit is transmitted while SCL is H. In case of bit transmission, the signal transition of SDA can not be
implemented while SCL is H.
If SDA changes while SCL is H, START condition or STOP condition is generated, it is interpreted as control signal.
SDA
SCL
SDA stable state:
SDA
change is
Data is effective
Possible
・START condition/STOP condition
Data transmission on bus is not implemented while SDA and SCL are H. At this time, if SCL remains to be H and SDA is
transited from H to L, then the START condition (S) is attained and so the access is started, and if SCL remains to be H
and SDA is transited from L to H, then the STOP condition (P) is attained and so the access is terminated, which is shown
below.
SDA
SCL
S
START Condition
P
STOP Condition
This device accepts the continuous START condition and the continuous STOP condition.
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8/15
2010.05 - Rev.A