019 119 099 199
Symbol
Min.
Typ.
Max.
Unit
Conditions
Serial data (1) (2) (3) (4)
SW
Measurement point
IQ GV THD VOM No CTC RI
- -1.5 - 2.0 - - 33
16 0 0.01 2.5 5 -95 47
35 1.5 0.09 - 17 -70 61
mA dB % Vrms Vrms dB k
No signal VIN=1Vrms VIN=2Vrms, 400~30kHz THD=1% Rg=0, IHF-A VIN=1Vrms (A1), Rg=0 (A2), IHF-A
000 000 000 000 000 000 -
002 002 002 002 002 002 -
001 001 001 001 001 001 -
003 003 003 003 003 003 00B -
1 2 2 2 1 2 (A1) 1 (A2) -
IQ VOUT THD VOUT VOUT VOUT (OUTF2) -
GVI ISET
16.5 -1.5
18 0
19.5 1.5
dB dB
VIN=200mVrms VIN=200mVrms
018 -
002 -
001 -
003 -
2 -
VOUT -
V1R V1E1 V1E2 V1MI
-50 -1 -2 -
-48 0 0 -95
-46 1 2 -85
dB dB dB dB
VIN=1Vrms 0to-30dB, VIN=1Vrms -32to-48dB, VIN=1Vrms VIN=1Vrms, IHF-A
000 - - 000
1CA - - 02A
001 - - 001
003 - - 003
2 - - 2
VOUT - - VOUT
003 - 003
2 - 2
VOUT - VOUT
VP-9690A (Average value detection, effective value display) IHF-A filter by Matsushita Communication is used for measurment. Operation spec : Phase between input / output is same. Design against radiation-proof is not mode.
9/26
BD3860K
Audio ICs
!Measurement circuit
0.047 0.01 220p 10 0.02
33 32
+
1M
+
1
31
30 29 28
1M
+
1
0.01
0.1
25
24 23
27
26
0.01
0.047
6.8k
34
22
0.1
35
470p 200k
21
220p
+
10
36
6.8k
20
0.047
0.1
37
19
470p 200k
0.047
38
+
10
18
+
10
0.033
39
BD3860K
17
3.3k
40
+
10
16
0.033 0.033
A1
41
15
3.3k
B1
+
10
42
14
0.033
C1
+
10
43
13
+
10 10k
D1
+
10
44
12
+
10 10k OUTF1 OUTR1 OUTF2 OUTR2
1
A1~D2 SW
2
+ +
10
3
4
+ +
10
5
6
7
8
IQ
9
10
+
10 10k
11
+
10 10k
+
10
10
47
GND
OUTF1~OUTR2 VOUT
THD
A2 Rg=0 VIN
B2
C2
D2
SI
SC
VCC
RL=10k
Fig.1 MEASUREMENT CIRCUIT DIAGRAM
Recommendable external parts 1. Element marked with * Carbon-film resistor : 1% * Film capacitor : 1% : 1% * Ceramic capacitor 2. Unless specified particularly, use the following external parts: * Carbon-film resistor : 5% * Film capacitor : 20% * Electrolytic capacitor : 20%
Notes on wiring 1. GND shall be wired solidly. 2. Wiring patter of SI and SC shall be away from that of analog unit and crosstalk shall not be acceptable. 3. Lines of SI and SC of shall not be parallel if possible. The lines shall be shielded, if they are adjacent to each other.
10/26
BD3860K
Audio ICs
!Circuit operations Specifications for control signal (1) Timing of control signal * Data is read at a leading edge of clock. * Latch is read at a trailing edge of clock. * Be sure to set SI to LOW after latching.
90% tsc twc 10% thd ts th tsd 90% twc 10% thd ts1 10% th1 90% 90%
SC ( CLOCK Signal )
SI DATA Signal LATCH Signal
90%
90% twd DATA 10%
90% twh 10% DATA 10%
90% tw1 LATCH
90%
Fig.2
Constant of timing chart (Ta=25C, VCC=9V)
Parameter "High" input voltage "Low" input voltage Clock width Data width Latch width "Low" hold width Setup time (DATACLK) Hold time (CLKDATA) Setup time (CLKLATCH) Hold time (CLKLATCH) "Low" setup time "Low" hold time Symbol VIH VIL Twc twd tw1 Twh Tsd Thd ts1 th1 Ts Th Min. 2.6 0 2.0 2.0 2.0 2.0 1.0 1.0 1.0 1.0 1.0 1.0 Typ. - - - - - - - - - - - - Max. 5.5 1.1 - - - - - - - - - - Unit V V s s s s s s s s s s
11/26
BD3860K
Audio ICs
(2) Control data format list
Input direction MSB
D10 D11 D12 D13 D14 D15 D16 D17 Loudness 0 : OFF 1 : ON D26 D27 Main volume select 0 : ch1 1 : ch2 D35 D36 D37 D18
LSB
D19
0
Input selector 00 : INA, 10 : INB 01 : INC, 11 : IND D21 D22 D23
Input gain (Refer to a setting table) D24 D25
Select address 0 0 D28 D29
D20
0
Main volume (Refer to a setting table)
Select address 1 0
D30
D31
D32
D33
D34
D38
D39
0
Bass / Treble / BBE Gain (Refer to a setting table)
Bass / Treble / BBE Select 00 : Bass 10 : Treble 01 : BBE OFF 11 : BBE ON D44 D45 D46
0
Select address 0 1
D40
D41
D42
D43 Fader volume
D47
D48
D49
0
(Refer to a setting table)
Fader select 00 : Front 1 10 : Front 2 01 : Rear 1 11 : Rear 2
Select address 1 1
Any of four control data formats can be selected by changing setting of select address. Initialize all the four formats of data at every turning on the power supply. (Example) Input direction MSB LSB Data L
MSB Data
LSB L
MSB Data
LSB L
MSB Data
LSB L
"L" means "Latch". At the second time after turning on the power suopply, set any data to be changed. (Example) To change the main volume. Input direction MSB LSB Data L
"L" means "Latch".
12/26
BD3860K
Audio ICs
(3) Control data format x setting table
Input select D10 Input INA INB INC IND D11 D12 0 1 0 1 0 0 1 1 Input gain Gain 0dB 1dB 2dB 3dB 4dB 5dB 6dB 0 8dB 10dB 12dB 14dB 16dB 18dB D13 D14 D15 0 1 0 1 0 1 0 1 0 1 0 1 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 0 0 0 1 1 1 1 0 0 0 0 1 D16 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 OFF ON Loudness D17 0 1 Select address D18 D19
Note: It is set to 18dB upon any data combination other than the above-mentioned.
13/26
BD3860K
Audio ICs
(4) Control data format y setting table
Main volume attenuation D20 ATT -0dB -1dB -2dB -3dB -4dB -5dB -6dB -7dB -8dB -9dB -10dB -11dB -12dB -13dB -14dB -15dB -16dB -17dB -18dB -19dB 0 -20dB -21dB -22dB -23dB -24dB -25dB -26dB -27dB -28dB -29dB -30dB -32dB -34dB -36dB -38dB -40dB -42dB -44dB -46dB -48dB - D21 D22 D23 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 D24 D25 D26 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 CH1 CH2 Main volume select D27 0 1 Select address D28 D29
1
0
Note: It is set to - upon any data combination other than the above-mentioned.
14/26
BD3860K
Audio ICs
(5) Control data format z setting table
Tone gain (Bass, Treble) D30 Gain 0dB 2dB 4dB 6dB 8dB 10dB 12dB 14dB 0dB -2dB 0 -4dB -6dB -8dB -10dB -12dB -14dB BBE gain Gain LOW HIGH (f=100Hz) (f=10kHz) 5dB 5dB 5dB 5dB
is 0 or 1
Bass, Treble BBE select D31 D32 D33 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D34 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Bass Treble BBE OFF BBE ON D35 D36 0 1 0 1 0 0 1 1 D37 0
Select address D38 D39
0
1
D31 D32 D33 0 1 0 1 0 0 1 1
D34
3dB 6dB 9dB 12dB
15/26
BD3860K
Audio ICs
(6) Control data format { setting table
Fader volume attenuation D40 ATT 0dB -2dB -4dB -6dB -8dB -10dB -12dB -14dB -16dB -18dB -20dB -22dB -24dB -26dB 0 -28dB -30dB -32dB -34dB -36dB -38dB -40dB -42dB -44dB -46dB -48dB -50dB -52dB -54dB - D41 D42 D43 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 D44 D45 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 CH1 Front CH2 Front CH1 Rear CH2 Rear Fader select D46 D47 0 1 0 1 0 0 1 1 Select address D48 D49
1
1
Note: It is set to - upon any data combination other than the above-mentioned.
16/26
BD3860K
Audio ICs
Control set up of tone control filter (1) About bass filter
IN
+ -
R3 R2
fO = 2
1 R1 (R2+R3) C1C2
(HZ)
Q=
R1R2C1C2 R1 (C1+C2)
BNF1 BNF2 C1 C2
BOUT1 BOUT2
G = 20log
(R2+R3) / R1+2 R3 / R1+2
(dB)
R1
However C1=C2
Fig. 3
Standard value of R2, R3 (reference) (At C1=C2, R1=3.3k) G Bass burst amount 0dB 2dB 4dB 6dB 8dB 10dB 12dB 14dB Resistance (k) Typ. R2 0 7.22 12.94 17.70 21.41 24.34 26.64 28.45 R3 28.45 21.23 G 15.51 10.75 7.04 4.11 1.81 0 Fig. 4 fO f
Actual burst amount may be dispositioned somewhat.
17/26
BD3860K
Audio ICs
(2) About treble filter
IN
+ -
R1 R2
OUT
fO =
1 2R2C
(HZ)
G = 20log
R1+R2+ZC R2+ZC
(dB)
TNF1 TNF2 C
Zc =
1 jc
()
Fig. 5
Standard value of R2, R1 (reference) G Treble burst amount 0dB 2dB 4dB 6dB 8dB 10dB 12dB 14dB Resistance (k) Typ. R1 0 3.49 6.25 8.45 10.19 11.58 12.68 13.55 R2 16.93 13.44 G 10.68 8.48 6.74 5.35 4.25 3.38 Fig. 6 fO f 3dB
Actual burst amount is dispositioned somewhat.
18/26
BD3860K
Audio ICs
+20 +15 +10
GAIN (dB)
VCC=9V VIN=200mVrms R1=3.3k C1=C2=0.22F
+20 +15 +10
GAIN (dB)
VCC=9V VIN=200mVrms C=0.0047F
+5 0 -5 -10 -15 -20 10
+5 0 -5 -10 -15 -20 10
50 100
500 1k f(Hz)
5k 10k
100k
50 100
500 1k f(Hz)
5k 10k
100k
Fig.7 Bass gain-frequency (reference) characteristics
Fig.8 Treble gain-frequency (reference) characteristics
Constant set up tone loudness filter
MAIN VOLUME
LOUDNESS SW
-30dB tap ON
+ - OUT
OFF
6.8k(Typ.)
VIN1 VIN2 IN R2 C2
LOUD1 LOUD2 C1 Setting for "fcl"
Setting for High frequency gain and "fch" R1=6.8k
Setting for ATT of Main Volume
Fig.9
MAIN VOLTAGE ATT
0dB
fcl=1/(2xC1xR1) Small R2 3dB Low Gain 14dB 3dB Large High Gain fch=1/(2xC2xR2)
-30dB
fcl
fch
f(Hz)
Fig.10
19/26
BD3860K
Audio ICs
The resistance R1 is used to set for attenuation of main volume at loudness ON. The resistance R1 should be the same 6.8k with inside resistance 6.8k (Typ.) of main volume -30dB tap at loudness OFF. Except this value, the attenuation of main volume at loudness ON is wrong. In the low frequency fully less than "fcl", the voltage gain is fixed on 14dB (Typ.) by inside constant at attenuation -30dB of main volume. The resistance R2 and the capacitor C2 are used to set for the characteristic in high frequency range. The voltage gain in high frequency range can be changed by the value of R2 like the upper figure.
MAIN VOLUME +0 0dB
VCC=9V, VIN=1Vrms C1=0.1F, R1=6.8k C2=470pF, R2=200k
-10
ATT (dB)
-10dB
-20dB -20 -30dB -30 -40dB -40 10 50 100 500 1k f(Hz) 5k 10k 100k
Fig.11 Loudness gain-frequency (reference) characteristics
BBE explanation of operation BBE is a system. This processor treats a loudspeaker and amplifier as an integrated sound system and it exactly reproduces the "rising edge of sound", which characterizes the sound, though appropriate signal processing at a front stage of amplifier input. This mechanism generates the playback sound almost like natural sound. (1) Problem of sound playback in sound playback system In the nature world, treble harmonics are produced first usually and then basic low-frequency wave is generated. This is the same with an attacking part which characterizes various kinds of sounds of musical instruments. The character of sound is expressed by the frequency upon rising edge of sound and the amplitude which forms an envelope. Therefore, it is very important to express the rising edge of natural sound exactly upon reproducing the sound through sound playback system. In the sound playback system of today, however, and unavoidable mismatch is made between a loudspeaker and amplifier. A transistor power amplifier operates as a constant voltage source because of negative feedback technology, while a loudspeaker is a current device. Therefore, an unavoidable mismatch is made in the system. Moreover, the impedance characteristic of loudspeaker various considerably depending on electric reactance of voice coil or mechanical reactance of cone assembly. As a result, the rising edge of sound is distorted and a phase of playback sound is deflected. Furthermore, increased treble impedance reduces the loudspeaker amplitude and harmonics. Therefore, treble constituent is easy to masked by subsequent high-level middle range constituent and the rising edge of sound becomes to hard to be reproduced so exactly.
20/26
BD3860K
Audio ICs
(2) Principle of operation BBE processes the signals to solve the above-mentioned problem of sound playback system as follows: Phase correction
Low range Mid range High range
20
150 Fig. 12
2.4k
20k
f(Hz)
By dividing the input signal into three frequency bands, the bass (20Hz to 150Hz), middle range (150Hz to 2.4kHz) and by combining them, the phase difference 180 is made between the bass and middle range and 360 between the bass and treble. Time delay characteristic in every frequency is adjusted through such phase difference and, therefore, the distortion of rising edge of sound can be minimized. Amplitude correction (Harmonic correction) High-speed detector and high-performance VCA circuit controls the amplitude of treble constituent to keep appropriate audibility balance at the treble which consists of harmonics. Correction value is decided by both operations at two kinds of levels; one level is set up by serial control from an outside source and another one is obtained by detecting an input signal. The amplitude of treble input into VCA is corrected by an internal control signal obtained through such operations. By this amplitude correction, the harmonics is recovered and the definition level of musical instrument or voice can be enhanced. Bass boost The bass constituent is boosted to keep well balance to the treble constituent varying dynamically. The boost is fixed to 5dB (Typ.) at f=100Hz by an internal circuit and it cannot be controlled externally.
21/26
BD3860K
Audio ICs
(3) Explanation of external constant Characteristic of high frequency filter Frequency characteristic at a maximum process control level is shown in the under-mentioned chart:
Gain
C1 Large Small Large
Lo Contour Process Control
C2 Small
C1 : Capacitor of VCA1-MIX1 Capacitor of VCA2-MIX2 C2 : Capacitor of MIX1-BBOUT1 Capacitor of MIX2-BBOUT2
f
Fig. 13
As shown in the above-mentioned chart, the cut-off frequency of treble constituent is decided by the external capacitors C1 and C2. The frequency characteristic marked with a dotted line varies depending on this value. Balance of harmonics changes and , therefore, it is an important parameter to decide the sound tone.
+14 +12 +10
GAIN (dB)
VCC=9V VIN=200mVrms VOL=0dB C1=0.047F C2=470pF PROCESS CONTROL 12dB (f=10kHz)
9dB
+8 +6 +4 +2 -0 -2 -4 10 50 100 500 1k f(Hz) 5k 10k 100k
LO CONTOUR 5dB (f=50Hz) 6dB
3dB
Fig.14 BBE gain-frequency (reference) characteristics
Controls the amplitude of treble by input signal level The attack and release time of controls the amplitude of treble can be decided by outside constant. The pins are DET1 (Pin 28) and DET2 (Pin 26). The method of setting is the lower figure. The input signal level started to control the amplitude of treble is fixed on about -40dBV (Typ.) by inside circuit. Therefor, it cannot be change from outside pin.
22/26
BD3860K
Audio ICs
R1 20k Attack Time : R1 x C Release Time : R2 x C DET1, DET2 +
C
R2
Fig. 15
VCC=9V
+14 f=10kHz +12 C=1F +10
GAIN (dB)
VOL=0dB R2=1M
PROCESS12dB PROCESS 9dB PROCESS 6dB PROCESS 3dB BBE OFF
+8 +6 +4 +2 0 -2 -4 -50 -40 -30 -20 -10 0
VIN(dBV)
Fig.16 Process control-input voltage (reference) characteristics
Time constant at switching ON/OFF At switching ON/OFF, this IC is used to switching of time constant, for measuring against DC offset. The pin for setting is DEF (Pin 27). The method of setting is the lower figure.
DEF T=CxR C R=500k
Fig.17
23/26
BD3860K
Audio ICs
!Application example
0.22 0.047 0.1 470p 10
+
1M
+
1
+
1M
1
0.01
0.1
33
0.01
32
31
30
29
28
27
26
25
24
23
0.047
34
6.8k 0.1
22
470p
35
470p 200k
21
+
10
36
6.8k 0.1
20
0.0047
37
470p 200k
19
0.0047
38
+
10
18
+
10
39
BD3860K
17
0.22 3.3k
40
+
10
16
0.22 0.22 3.3k
A1
41
15
B1
+
10
42
14
0.22 OUTF1
C1
+
10
43
13
+
10 OUTR1
D1
+
10
44
12
+
10
1
+
10
2
+
10
3
+
10
4
+
10
5
+
47
6
7
8
9
10
+
11
+
10
GND
VCC
10
A2
B2
C2
D2
SI
SC OUTR2 OUTF2
Fig.18
!Operation notes 1. About operation voltage supply range Within operation voltage supply range, basic circuit function operation is guaranteed within operation ambient temp. But please confirm set up of constant and element, voltage set up and temp set up on use. 2. About operation temp range If it within recommended operation voltage range, circuit function operation is guaranteed within operation temp. It corralled to conditions of power dissipation to temp. Please watch out except condition stipulated by electrical characteristics within the range, It cannot guarantee standard value of electrical characteristics. But it retains original function.
24/26
BD3860K
Audio ICs
3. About Application circuit Example of application circuit drawing is convinced as recommendable, but please confirm characteristic including above mentioned noticed. At use with modification of external constant, please decide with enough margin considering distribution, ETC of this IC, external parts including quiescence characteristics and excessive characteristics. Please note that we have not yet confirmed any concerned patent rights completely. 4. About power on reset At on of supply voltage circuit made initialization inside IC is built-in. To be concrete, setting is made so that the following table. Please send data to all address as initial data at supply voltage on. And please supply mute at set side until this initial data is sent.
Function Input selector Input gain Loudness Main volume Bass gain Treble gain BBE Fader volume
Initial condition INA 0dB OFF -dB 0dB 0dB OFF -dB
5. About 2-wire serial control High-frequency digital signal is inputted into the SC terminal and SI terminal. So wire and print patterns suitably to prevent interference to analog signal system line. 6. About muting When the attenuation of main volume is changed from -48dB to -dB, it maybe occur pop noise caused by DC offset. Therefor, to prevent it, please mute by fader volume first of all, and then mute by main volume. Conversely, when the muting is released, please by main volume first of all, and then release by fader volume. 7. About the license of BBE Sound Inc. This IC is manufactured according to the license of BBE Sound Inc. Upon using it, the license agreement with BBE Sound Inc. is required. 8. About setting of main volume in using BBE Controls the amplitude of treble of BBE are motioned by detecting the signal level after main volume. Therefor, when the signal is attenuated less than about -40dBV (Typ.) in main volume, controls the amplitude of treble cannot be motioned. To attenuation that dose not spoil the controls the amplitude of treble, please use fader volume.
25/26
BD3860K
Audio ICs
9. About relation between BBE and the other audio parameter When BBE is ON, please use all flat of tone and loudness. And when you use other processor (SRS/Spatializer/QSound etc.), please plan that BBE places in later in later position. When you use Dolby-Surround or Dolby-ProLogic, it is no problem that BBE places in first position to reduce numbers of channels. But if you cannot apply to Dolby lab. For permission, BBE places in later position.
!External dimensions (Units : mm)
14.0 0.3 10.0 0.2
33 23 22
14.0 0.3 10.0 0.2
34
44
12
1
2.15 0.1 0.05
11
0.15 0.1
0.8
0.35 0.1
QFP44
1.2
0.15
26/26
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document use silicon as a basic material. Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.0
