The minimum system and development of Lingyang 16-bit single-chip microcomputer SPCE061A

1 Main features of SPCE061A

SPCE061A is another 16-bit microcontroller chip launched by Lingyang Technology Co., Ltd. after the μ'nSPTM (Microcontroller and Signal Processor) series products SPCE500A and others. Unlike SPCE500A, SPCE061A has only 32k flash memory FLASH built in. Its high processing speed enables SPCE061A to process complex digital signals very easily and quickly, making it particularly suitable for applications such as digital speech recognition. SPCE061A has an operating speed range of 0.32-49.152MHz within the operating voltage range of 2.6V-3.6V, and has an 8-channel 10-bit analog-to-digital conversion input function and a microphone input method with a built-in automatic gain control function; it also has a dual-channel 10-bit DAC audio output function. Therefore, SPCE061A is an economical application solution for digital sound and speech recognition products. Its main performance is as follows:

a 16-bit / A'nSPTM microprocessor;
operating voltage range: VDD is 2.6-3.6V (CPU), Voo is VDD"5.5V (I/0);
CPU clock: 0.32-49.152MHz;
built-in 2k words of SRAM;
built-in 32k flash FLASH;
with programmable audio processing function;
with power saving function, the system consumes less than 2mA@3.6V in standby state (clock is stopped);
with 2 16-bit programmable timer/counters (with automatic preset initial count value);
with 2 10-bit DAC (digital-to-analog conversion) output channels;
with 32-bit general-purpose programmable input/output ports;
with 14 interrupt sources, which can be interrupted through 2 timer A/B time bases External clock source input key wake-up;
with touch key wake-up function;
uses Lingyang audio coding SACM-S240 mode (2.4k bit/s), can accommodate 210 seconds of voice data;
can provide system clock signal through phase-locked loop PLL oscillator;
with 32768Hz real-time clock;
with 7-channel 10-bit voltage analog-to-digital converter (ADC) and single-channel sound analog-to-digital converter;
the sound analog-to-digital converter input channel has built-in microphone amplifier and automatic gain control (AGC) circuit;
with serial device interface;
with low voltage reset (LVR) and low voltage monitoring (LVD) functions;
with built-in online emulation circuit (ICE In-Circuit Emulator). 2 SPCE061A structure and function 

The internal structure of the SPCE061A single-chip microcontroller is shown in Figure 1. It has a total of 84 pins, the package form is PLCC84, and the function of each pin is listed in Table 1.


3 Minimum system composition of SPCE061A

The minimum system composition of SPCE061A is shown in Figure 2. As can be seen from the figure, its wiring is relatively simple. Connect the crystal oscillator and resonant capacitor to the OSCO and OSCl terminals, and connect the corresponding capacitor and resistor to the RC input VCP terminal of the phase-locked loop voltage-controlled oscillator to work. Connecting a 0.1YF or 1001~F decoupling capacitor to the other unused power supply terminal and ground terminal can improve the anti-interference ability of the system.

4 Development of SPCE061A

The development of SPCE061A can be achieved through the online debugger PROBE. In fact, PROBE is both a programmer (i.e., a program burner) and a real-time online debugger. It can replace two commonly used tools in the development process of single-chip microcomputer application projects-hardware online real-time emulators and program burners. It uses the built-in online emulation circuit ICE (h-CircuitEmulator) of SPCE061 and Lingyang's online serial programming technology. PROBE can work under Lingyang IDE integrated development environment software package. Its 5-pin simulation head can be directly connected to the corresponding pins of SPCE061A on the target circuit board, and can directly debug and run the user-compiled program through the CPU (SPCE061A) on the target circuit board. The other end of PROBE is a standard 25-pin printer interface, which can be directly connected to the computer's printer port. Its communication with the host computer can be completed under the computer IDE integrated development environment software package. Figure 3 shows the peripheral connection interface circuit for online debugging between the computer, PROBE, and the user's target board.


5 Conclusion

SPCE06A can be widely used in speech recognition, voice-based instruments, voice home appliances, voice vending machines, intelligent voice interactive toys, advanced teaching and toys, children's electronic storybook products and general speech synthesizer products. It is also suitable for the development and production of products that require a longer voice duration.