BU7858KN_10 Datasheet, PDF (16/25 Pages) Rohm – Mixer & Selector ICs with 16bit D/A Converter

BU7858KN,BU7893GU
Technical Note
・Timing Diagram
（Repeated）
START
conditions
BIT 7
BIT 6
tSU;STA tLOW tHIGH 1/fSCLK
Acknowledge ^STOP
condition
SCL
SIO
t BUF t HD;STA
tSU;DAT t HD;DAT
tSU;STO
Fig.35 I²C Timing Diagram
DVDD_IO=1.62～3.3V, Ta=-30～+85℃
Parameter
Symbol
Min
Limits
Typ
Hold Time at Start Condition
t_HD;STA
0.6
-
SCLK “H” Level Time
t_HIGH
0.6
-
SCLK “L” Level Time
t_LOW
1.3
-
Set-up Time for Repeated Start Condition
t_SU;STA
0.6
-
Data Hold Time
t_HD;DAT
0
-
Data Set-up Time
t_SU;DAT
100
-
Set-up Time for Stop Condition
t_SU;STO
0.6
-
Bus Release Time between Stop Condition
and Start Condition
t_BUF
1.3
-
Max
-
-
-
-
0.9
-
-
-
Unit
µsec
µsec
µsec
µsec
µsec
nsec
µsec
µsec
Conditions
●Pin function
【BU7858KN】
No. Pin Name I/O
Pin Function
1
SDTI
2
LRCLK
3
BCLK
4
DVDD
5
DVSS
6
SCLK
7
SDATA
8
NCS
9
NRST
10 CSTEP
11 CSTART
12 CVCOM
13
HP_R
14
CA_R
I Audio DAC Serial Data Input
I Audio DAC LR Clock
I Audio DAC BIT Clock
- Digital Power Supply
- Digital Ground
I Serial Clock for CPU Interface
I Serial Data for CPU Interface
I Serial Chip Selection for CPU Interface
I Reset Input L: Reset
- Capacitor Connection Terminal for Pop Noise Reduction
-
Capacitor Connection Terminal for Pop Noise Reduction at
Start-up
-
Capacitor Connection Terminal for Internal Reference Voltage
Output
O Headphone Amplifier Output R-ch
- Low-band Correction Capacitor for Headphone Amplifier R-ch
Power
DVDD
DVDD
DVDD
-
DVDD
DVDD
DVDD
DVDD
DVDD
AVDD
Equivalent
Circuit
Diagram
A
A
A
-
-
A
A
A
A
C
AVDD
G
AVDD
G
AVDD
H
AVDD
C
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16/24
2010.09 - Rev.A