BU7839GVW Datasheet, PDF (8/16 Pages) Rohm – Digital Input Hi-Fi Class-D Headphone Amplifier

● DC characteristic
Ta=25degree,DVDD=DVDDIO=1.5V, VDD_R=VDD_L=PLLVDD=2.8V
Standardized values
Item
Symbol
MIN
TYP
MAX
Input ’H’ Level
0.7x
VIH
DVDDIO
-
-
Input ’L’ Level
VIL
-
-
0.3x
DVDDIO
Output ’H’ Level
VOH
0.8x
DVDDIO
-
-
Output ’L’ Level 1
VOL1
-
-
0.2x
DVDDIO
Output ’L’ Level 2
(SDA terminal)
VOL2
-
-
0.2x
DVDDIO
Table 10 DC characteristic
Unit
Note
V
V
V Io=-1mA
V Io=1mA
V Io=3mA
●2wire CPU I/F Part
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 _{A7 A6 A5 A4 A3 A2 A1} W/R
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
S_SDD_DAa_Astata_{安isbl定eeffs状etac態ttiev:e：}
データ有効
SDA
SchDanAg変e is化
Po_可ss_能ible
● 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
ST^SA^TR^AT^Rc^To^条nd^件ition
P
STSOTPOPcon条di件tion
This device accepts the continuous START condition and the continuous STOP condition.
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