GPC74P032B, a 4-bit sound controller, is embedded with a 4-channel SPU for MIDI playback, a 4-bit RISC CPU, 14-bit PWM, 9 IOs, 1 input pin (with pull low resistor), 256-nibble RAM, and OTP with density of 64K*12-bit of memory space. The operating voltage ranges from 2.0V through 5.5V and operating speed is 2Mhz, configurable through inner oscillator. Other features include Low Voltage Reset, IR carry output, Wachdog, five interrupt sources with two Time-bases, etc.
1、4-bit RISC CPU
3、CPU Clock：2Mhz，System Clock：8Mhz
4、14-bit PWM driver for driving speaker directly
5、Five interrupt sources with two Time-bases
6、Support 4-channel MIDI
7、Key wakeup function
8、Low voltage reset ,Watchdog