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High cost performance , Compared with the traditional OTP Chip , The improvement of process greatly reduces the cost , At the same time, the chip can be burned repeatedly
Users can change the sound by themselves , Through the serial port at the computer end, you can complete it by yourself , No other expensive tools are required
The chip comes with enough space , You can pursue higher sound quality

1.2 function sketch

1. 32 position DSP Voice chip 、5MHZ Internal oscillation of ,PLL To 120MHZ;

2. Working voltage 2.0~5.5V; Pay attention below 3.3V Power supply of , There are differences in hardware details

3. Standby power consumption is less than 25ua; There is also a low power consumption mode 1.5uA

4. 16bit Of PWM Output 、 Can drive directly 8 ohm /0.5W horn ;

5. Provide tools to convert audio format by themselves , All users can operate by themselves , It's simple

6. 16KHZ It can support at most 200 second .8KHZ It can support at most 400 second

7. Customers can use Tools and software on the computer side , Change the voice content directly through the serial port

8. Support one-line serial port control , Of course, you can customize various agreements according to your needs

9. Support 224 Segment address , There are more requirements to expand ;

10. With hardware iic Interface 、UART Interface , Various functions can be customized for customers .

11. The chip has the ability to burn repeatedly , So don't worry about incomplete testing at any time , Lead to batch problems

1.3 Chip power consumption description

state	Detailed description
Play status	Power consumption of playback state , It depends on the load of external speakers , Basically maintain at 150mA--200mA Between The chip itself is playing , Power consumption is 8mA about
Idle state	When the chip itself does not play , Or after the broadcast , Will automatically enter standby mode The power consumption of the chip itself is 25uA about , Enough general application scenarios
Ultra low power state	1、 The chip also has an instruction , It is to let the chip enter ultra-low power consumption , That is, the shutdown state , The power consumption is 2uA 2、 See... In the manual for details 4.3 Chapter description

2. Parameters explain

The chip is SOC programme , Integrated with a 16 Bit MCU, And an audio decoder aDSP, Hard decoding is adopted , It ensures the stability and sound quality of the system . The small package size can better meet the needs of embedding other products

2.1 Pin instructions

Pad No	Pad Name	ATTR	Description describe
1	GND	Power	Negative pole of power supply
2	PB9	I/O	Busy The signal = Play output low idle output high Multiplex serial port download , Connect MCU perhaps USB turn TTL Of RX foot
3	PB1	I/O	[ONELINE-DATA] One line serial port input terminal Multiplex serial port download , Connect MCU perhaps USB turn TTL Of TX foot
4	PB0	I/O	KEY Key -- test IO-- Trigger to the ground and play
5	SPK1	Out	There is no difference between positive and negative , Support 8 ohm 0.5W
6	SPK2	Out	There is no difference between positive and negative , Support 8 ohm 0.5W
7	VDDIO	Power	Internal to the chip LDO Output , Maximum 100mA
8	VBAT	Power	Positive pole of power supply

Precautions for power supply ：

It is recommended to supply power to the chip , Achieve 5V Power supply , The higher the voltage, the higher the power of the chip driving the horn , The louder the sound
If it is [3.3--4.2V] Lithium battery scenario , The positive pole of the power supply goes directly into the chip 8 Just feet
If it is a dry battery power supply scenario , The positive pole of the power supply also goes directly into the chip 8 foot
If extra low voltage power supply is required , Such as 2V--3V Between the button batteries , Suggested chip 7 Feet and 8 The pin is directly short circuited , Then connect the positive pole of the power supply

2.2 GPIO Electrical characteristics

IO Input features
Symbol	Parameters	Minimum	A typical	Maximum	Company	Testing conditions
VIL	Low-Level Input Voltage	-0.3	-	0.3*VDD	V	VDDIO=3.3V
VIH	High-Level Input Voltage	0.7VDDIO	-	VDDIO+0.3	V	VDDIO=3.3V
IO output characteristic
Symbol	Parameters	Minimum	A typical	Maximum	Company	Testing conditions
VOL	Low-Level Output Voltage	-	-	0.33	V	VDDIO=3.3V
VOH	High-Level Output Voltage	2.7	-	-	V	VDDIO=3.3V

2.3 GPIO The internal characteristics of

Port

General

Output

High

Drive

Internal

Pull-Up

Resistor

Internal

Pull-Down

Resistor

Comment

PB0,PB1

8mA

64mA

10K

60K

1、PB0 & PB1 default pull down

2、internal pull-up/pull-down

resistance | accuracy ±20%

PB9

8mA

10K

60K

2.4 Reference circuit

A line of Communication protocol

At present, the chip supports one-line serial communication protocol , It is also determined by the time width of high and low levels 0 perhaps 1 .

3.1 Communication format

Put the data cable first DATA, That is to say ONELINE, Pull it down 6ms after , send out 8 Bit data , Send low order first , Then send the high-order message . Use the high-level and low-level ratio to represent the value of each data bit .

Be careful ： The high level must be in front , Low level is in the rear .

Recommended 200us：600us. Value range ： narrow pulse =[150us--400us] Wide pulse [500us--1000us]

Pay attention to 3:1 and 1:3 Level proportion to ensure stable communication .

Pay attention to the beginning 6ms Low level , During initial commissioning , Try to use an oscilloscope or logic analyzer to see , Error in 10% Both sides can accept

1、0x00H To 0xDFH Define a function code for the voice address code .

2、0xFE Is the voice stop code , Send this command to stop playing voice .

3、 The interval between codes must be greater than 20ms

3.2 Communication command

NO. Serial number	Data code	Voice Speech meter
0	0x00	Retain
1	0x01	voice 1
2	0x02	voice 2
3	0x03	voice 3
		……
224	0xE0~0xEF	15 Level volume ,0xE0H Is the minimum volume 0,0xEFH Maximum volume ( Power on default ). （ If you need to adjust the volume , Then send the volume code first , Partition 20ms Send the voice code again ）
225	0xF0	To turn it off . Enter the ultra-low power consumption state =1.7uA, See 4.3 chapter After entering this state , You also need a control chip , You need to lower it first DATA foot 40ms The purpose is to wake up the chip , You can send commands to control normally ,
242	0xF2	Cyclic code -- See 4.1 chapter If you need to cycle a sound , Then send the voice code first , Partition 20ms Retransmit cyclic code ）
243	0xF3	Code play -- See 4.2 chapter F3H+ Voice address A, Voice address B, Voice address C,… At the playback address A When , Don't interrupt after receiving the code , End of play A, Just play it B, And then play C….F3 And address 20ms Time delay of . And one group of concatenated addresses and the next group of addresses need 40ms Time delay （“F3+ Voice address ” For a set of concatenated addresses ）
254	0xFE	Stop code

/*******************************************************************************
 -  Function description ： One line communication data transmission 【 Pay attention to debugging , Use an oscilloscope or logic analyzer to check the pulse width 】
 -  Subordinate module ： Inside 
 -  Parameter description ：dat =  Data to be sent 
 -  Return instructions ： nothing 
********************************************************************************/
#define IO1_HIGH()		JL_PORTA->DIR &= ~BIT(6);JL_PORTA->OUT |=  BIT(6);
#define IO1_LOW()		JL_PORTA->DIR &= ~BIT(6);JL_PORTA->OUT &= ~BIT(6);

void oneline_send_one_data(u8 dat) 
{
    u8 i = 0 ;
    IO1_LOW() ;/* Now pull the bus down */
    udelay(5000) ;/* Time delay 6MS ---  Here is the starting signal for initiating communication */
    CPU_SR_ALLOC();// Close the interrupt -- Chips are different , The interfaces may be different 
    OS_ENTER_CRITICAL();// Close the interrupt 
    for(i=0 ; i<8 ;i++){
        if(dat & 0x01){
            IO1_HIGH() ;
            udelay(500);/* Time delay 600us*/
            IO1_LOW();
            udelay(170) ;/* Time delay 200us*/
        }else{
            IO1_HIGH() ;
            udelay(170);/* Time delay 200us*/
            IO1_LOW();
            udelay(500) ;/* Time delay 600us*/
        }
        dat = dat >> 1 ;/* At the time of sending , Send the highest bit first , Send the next high bit , And so on */
    }
    IO1_HIGH() ;/* When you are free, just pull the foot up */
    OS_EXIT_CRITICAL();// Open the interrupt 
    /* At the same time pay attention to , When the chip is initialized , Please pull up the signal pin .*/
}

oneline_send_one_data(0x05);// Corresponding to play the 5 Segment sound

Reference routine

/*******************************************************************************

- Function description ： One line communication data transmission 【 Pay attention to debugging , Use an oscilloscope or logic analyzer to check the pulse width 】

- Subordinate module ： Inside

- Parameter description ：dat = Data to be sent

- Return instructions ： nothing

********************************************************************************/

#define IO1_HIGH()JL_PORTA->DIR &= ~BIT(6);JL_PORTA->OUT |= BIT(6);

#define IO1_LOW()JL_PORTA->DIR &= ~BIT(6);JL_PORTA->OUT &= ~BIT(6);

void oneline_send_one_data(u8 dat)

{

u8 i = 0 ;

IO1_LOW() ;/* Now pull the bus down */

udelay(5000) ;/* Time delay 6MS --- Here is the starting signal for initiating communication */

CPU_SR_ALLOC();// Close the interrupt -- Chips are different , The interfaces may be different

OS_ENTER_CRITICAL();// Close the interrupt

for(i=0 ; i<8 ;i++){

if(dat & 0x01){

IO1_HIGH() ;

udelay(500);/* Time delay 600us*/

IO1_LOW();

udelay(170) ;/* Time delay 200us*/

}else{

IO1_HIGH() ;

udelay(170);/* Time delay 200us*/

IO1_LOW();

udelay(500) ;/* Time delay 600us*/

}

dat = dat >> 1 ;/* At the time of sending , Send the highest bit first , Send the next high bit , And so on */

}

IO1_HIGH() ;/* When you are free, just pull the foot up */

OS_EXIT_CRITICAL();// Open the interrupt

/* At the same time pay attention to , When the chip is initialized , Please pull up the signal pin .*/

}

oneline_send_one_data(0x05);// Corresponding to play the 5 Segment sound

1. Communications give an example F2-- Loop Playback

void oneline_test_CMD_F2(void){

oneline_send_one_data(0x01) ;