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WTV020 Schematic ( PDF Datasheet ) - Elechouse

Teilenummer WTV020
Beschreibung (WTV010 / WTV020) OTP Voice Chip
Hersteller Elechouse
Logo Elechouse Logo 




Gesamt 29 Seiten
WTV020 Datasheet, Funktion
www.elechouse.com
WTV010 & WTV020
Datasheet
1.Features............................................................................................................................................................... 2
2. Chip models........................................................................................................................................................2
3. Package sketch map ..........................................................................................................................................2
4.Pin’s descriptions .................................................................................................................................................3
4.2. WTV020 SOP20 package................................................................................................................................4
5. Electric parameters .............................................................................................................................................4
6.Absolute maximum ratings...................................................................................................................................5
7. Pins detail functions (D0D8) ............................................................................................................................5
8.Control modes .....................................................................................................................................................6
8.1. Keyboard ..................................................................................................................................................6
8.2. Parallel interface (COM+SBT) ..................................................................................................................8
8.3. One line serial interface. ...........................................................................................................................9
8.4. Two lines serial interface (For external SD card using)........................................................................... 11
8.5. Three lines serial interface...................................................................................................................... 11
9.Typical application circuits ................................................................................................................................. 12
9.1. Keyboard mode PWM output (Direct drive speaker)...................................................................................... 12
9.2. Keyboard mode DAC output (External amplifier )................................................................................... 13
9.3. WTV010/WTV020 DIP16/SOP16/TSSOP16 ,parallel interface(COM+SBT) mode PWM output............ 13
9.4. WTV010/WTV020 DIP16/SOP16/TSSOP16 , one line serial interface PWM output .............................. 14
9.5. WTV010/WTV020 DIP16/SOP16/TSSOP16 , three lines serial interface PWM output .......................... 14
9.6. WTV020-20S , Parallel (COM+SBT) interface PWM output ................................................................... 15
9.7.WTV020-20S , one line serial interface PWM output............................................................................... 15
9.8. WTV020-20S two lines serial interface PWM output .............................................................................. 16
10. Packages and Pins ......................................................................................................................................... 17
10.1. DIP 16 dimension ................................................................................................................................. 17
10.2. SOP16 dimension................................................................................................................................. 18
10.3. SOP20 dimension................................................................................................................................. 18
10.4. TSSOP16 dimension ............................................................................................................................ 19
11.Timing control................................................................................................................................................... 21
11.1.Timing control waveform ........................................................................................................................ 21
11.2.Timing value........................................................................................................................................... 22
12. One line , three line serial interface control flow ............................................................................................. 22
13. One serial interface program .......................................................................................................................... 23
13.1.One line serial finterface Assembly........................................................................................................ 23
13.2.One line serial interface C program ....................................................................................................... 24
14. Three lines serial interface progarm................................................................................................................ 26
14.1. Three lines serial interface Assembly ................................................................................................... 26
14.2. Three lines serial interface C program.................................................................................................. 27
15. Supply information .......................................................................................................................................... 29
16. Versions .......................................................................................................................................................... 29
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WTV020 Datasheet, Funktion
www.elechouse.com
OPO is chip internal amplifier reactive output pin, OPI is chip internal amplifier reactive input pin . When use the
PWM output to direct speaker , the reactive circuit should be connected .When use DAC output to connect
external amplifier , reactive circuit is not needed. SPKP and SPK-N are audio output , connect 0.5W/8ohms
speaker when PWM output . When DAC output, OPO connect a capacitor to amplifier input, and share GND. Pls
see the application circuit.
RESET ,BUSY
Low level reset the chip , this low level not less than 2ms ,after reset , pull up not less than 5ms , will let the chip
into working. Busy can be set to low or high output in the software .
8.Control modes
WTV010/WTV020 with keyboard, one line serial , two lines serial , three lines serial and parallel interface control
modes. User can choose the mode in the PC software before program sounds into the chip.
8.1. Keyboard
In this mode, each I/O can trigger one ground of sound ,and the trigger mode can be set individually.
Debounce time is 10ms in key mode. The trigger mode include Pulse retrigger, pulse trigger, level retrigger, level
trigger, on/off, down, up ,down loop , up loop , the detail function please see the waveform.
8.1.1.Pulse retrigger
Negative pulse trigger, when I/O port detect falling edge (such as short touch the I/O port to the GND), trigger and
play voice. During the playing , falling edge was detected again, the voice will be interrupted and re-play.
8.1.2. Pulse trigger
Negative pulse trigger, when I/O port detect falling edge (such as short touch the I/O port to the GND), trigger and
play voice. During playing ,even falling edge was detected again, the chip will not take other action.After voice
played over, falling edge become valid to trigger sound .
8.1.3. Level retrigger
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WTV020 pdf, datenblatt
www.elechouse.com
8.5.3. Timing waveform for three lines serial interface.
In three lines serial interface have CS , CLK and DATA . it is imitate SPI communication .
Reset should be pull low 5ms before send code ,then pull high not less than 5ms . Reset should stay high level.
CS signal pull low 5ms to wake up chip , then send LCK and DATA , Clock cycle between 200us to 1ms , we
suggest 400us .Data should send low first , then high . After data received , CS, CLK,DATA set to high level . After
20ms , BUSY will have response.
RESET
CS
5m s
5m s
CLK 5m s
DATA
VOICE
BUSY
400us
D0 D1 D2 D3 D4 D5 D6 D7
8.5.4. Program examples
Please see at “ 14. three lines serial infterface program.”
9.Typical application circuits
9.1. Keyboard mode PWM output (Direct drive speaker)
R1
15K
+3. 3 V
C2
104
C1
102
SPEAKER
1
2
3
4
5
6
7
8
D1
GND
OPI
OPO
VCC
SPK_P
SPK_N
BUSY
D0
RESET
D5
D4
VDD
VPP
D2
D3
16
15
14
13
12
11
10
9
WTV020-16P
MAX809
RST VCC
GND
C3 104
+3. 3 V
+3. 3 V
C4 105
D0D5 keep 10ms low level or give negative pulse , can trigger voice . BUSY will be low level during playing ,
other time will be high level. Reset should keep low level 5ms . R1 and C1 are for reactive circuit, change R1
value and change the volume output, 050K is ok , use 15K in circuit. Bigger volue ,higher sound volume. SPK
can direct drive 0.5W/8speaker in PWM output. VCC can be 2.5V3.6V . If battery power this chip, it can be
use capacitor connect GND to reset. If use DC power, it have to use reset circuit or MCU to reset.
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12 Page





SeitenGesamt 29 Seiten
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