描述 Description

The GPCH4A24A embedded with an 8-bit processor, 1M bytes ROM chip, 512 bytes working SRAM, three 12-bit timers, 32 general I/Os, and two 12-bit DACs. The microprocessor can implement software based on audio processing, functional control and others. For audio processing, melody and speech can be mixed into one output. The GPCH4A24A features a high performance SPU voice engine to achieve 8 channel voice with ADPCM/PCM. It operates over a wide voltage range of 2.4V - 5.5V and includes Low Voltage Reset function. In addition, GPCH4A24A provides sleep mode for power savings. It can be awakened from sleep mode by external interrupt source or IOA's state change.

特性 Features

? Working Voltage: 2.4V - 5.5V
? CPU Speed: 7.159MHz.
? FOSC = 14.318MHz (2 x CPU clock)
? ROM Size: 1M bytes
? RAM Size: 512 bytes (programmable RAM 384 bytes)
? Three 12-bit timer/counter, TMA/TMB/TMC (Programmable and auto-reloadable)
? Sleep mode to reduce power
? Key change wakeup function
? 10 IRQs & 6 NMI Interrupts
? Watchdog Function
? Low Voltage Reset: 2.2V
? 32 general I/Os, including 8 general/special I/Os (All bits are programmable)
? 8-bit I/O with high sink current(20mA) for LED application
? IOA with 1M pull low function to prevent current leakage from error key touch
? Two 12-bit DAC outputs (D/A output: 4mA/channel)
? SPU (Sound Processing Unit) engine can output audio data of 15-bit resolution with 12-bit DAC to perform high quality sound
? IR PWM Output
? 4-channel SPU engine with ADPCM/PCM wave table
? Tone color (Speech) with ADPCM algorithm to save memory usage