APT540is a 40 Sec Easy Use Speech IC .It Support PWM or DAC voice output with high quality speech , There are 40 second Voice Length under 6 KHz sampling and 4 bit hardware compression.
    Its internal built-in a oscillator for system clock without an external resistor. Maximum 63 voice groups. One Group contain several steps(voice section ); Maximum 700 steps for all the Groups. Each Step can be define Trigger Mode, Output Status, Voice Section, Mute length, I/O Type & Simple Programming Function.
    User can select 8bit / 5bit / 4bit data compression. Support three mode trigger IC (Stand Alone, Serial Trigger Mode, CPU Command Mode ). Easy use development system is for function selection and voice combination . PC download the ROM code by the USB Port .

APT540is Functions

MAX voice file : 700

MAX Trigger Groups : 63

Power On Trigger Group :1 

MAX Step : 700 

Signal step mute length : 0.64 s ( 6k sample rate )

Operating Voltage range: 2.4V ~ 4.5V

Total Voice Duration : 40” (120K Samples)

I/O pin : 8

Voice output : PWM or DAC

Sequential Key : TG1 -> 32 Groups.

                               TG2 -> 29 Groups.

                               TG3~TG8-> 1 Group 

Debounce time : 50 us or 10 ms

On/Off function : only for all TG PIN

Sequential Key for Volume control function.

Step can change Trigger I/O Type, Trigger Mode & Output Status.

Hardware Trigger Group Repeat function.

(a) Write data to working register.

(b) Working Register Increasing.

(c) Step Jump by Working Register / Volume Status.

Three Mode Trigger IC :

- Key Stand-alone Trigger Mode :

    A. Edge/Level 

    B. Hold/Unhold

    C. Retrigger/Irretrigger

- Serial Trigger Mode :

    Combinations of TG1 and TG2 to trigger maximum 63 Voice Group.

- CPU Command Mode :

    User command through TG1,TG2,TG3 with SPI CPU Interface to control the Multi-Playback function.

    A. Stand by Status. (High/Low Status)

    B. Busy Low Active.

    C. Busy High Active.

    D. LED Flash at 6 Hz.

    E. LED Flash at 3 Hz.

    F. LED Flash at 1.5 Hz.

    G. LED Flash at 0.75 Hz.

    H. PWM for LED Dimming Control.

    APT540 can provide different play rate in one code as follow below Reference Sample Rate.

    3K, 3.2K, 3.31K, 3.42K, 3.55K, 3.69K, 3.84K, 4K, 4.17K, 4.36K, 4.57K,

    4.8K, 5.05K, 5.33K, 5.64K, 6K, 6.4K, 6.85K, 7.38K, 8K, 8.72K, 9.6K, 

    10.66K, 12K, 13.71K, 16K, 19.2K, 24K.

TG2 Low Reset

TG3 Volume Control