The NY7 series IC is a powerful 4-bit micro-controller based sound processor. There are 8 channels that are configured as speech or MIDI, and all of these 8 channels or part of them can be played with speech or MIDI simultaneously.NY7 can precisely synthesize any tone frequency of MIDI with +/- 0.5% accurate internal oscillation and automatic Tone-Calibration. Besites, NY7 provides two kinds of audio outputs with fine resolution, one is 13-bit current-type D/A converter (DAC) and the other is 13-bit Push-Pull amplifier (PP). Therefore NY7 speech/melody quality is the best choice among all solutions.
Wide operating voltage range: 2.0V to 5.5V.
4-bit RISC type micro-controller with 74 instructions.
NY7CxxxA have 19 bodies. The maximum ROM size is 1536K x 12-bit. Program and voice data share the same ROM space.
448x4-bit RAM, divided into 2 pages.
Up to 4MHz system clock for instruction execution.
Slow mode to operate at low power consumption. (+/-3% accuracy)
Built-in internal Ring oscillation is accurate with +/- 0.5% frequency deviation.
Low voltage reset (LVR=1.9V) and watch-dog reset (WDT) are supported to protect the system.
One interrupt entrance for multiple interrupt sources with an independent stack.
Up to 24 flexible Bi-direction I/Os. Direction of each I/O is independently controlled by individual register bit.
Each Bi-direction I/O pin can be optioned as different input and output function. For the input option, users can select one of three kinds of option: input with pull-high resistor, input without pull-high resistor, or input with register-controlled pull-high resistor (high-to-low wakeup only). For the output option, users can select one of three kinds of option: output with normal drive current and normal sink current, large sink current or constant sink current. (Mask option)
Shared pins to provide IR carrier and external reset feature: PF2/IR & PF3/Reset. (Mask option)
Selection of IR carrier frequency and data high/low IR output is supported.
Maximum of 8 channels can be played simultaneously, each channel can be arbitrarily assigned as speech or MIDI channel.
New high fidelity 6-bit ADPCM speech/ MIDI timbre synthesis algorithm and ADSR with 256-step envelope for MIDI synthesis.
Patented noise filtering algorithm with 128KHz over sampling to enhance signal-to-noise ratio and provide excellent sound quality without ROM size increase.
16-step digital volume control for synthetic speech/melody.
Built-in hardware automatic Tone-Calibration of near-zero frequency deviation for precise tone frequency.
High quality 13-bit D/A converter or 13-bit push-pull amplifier audio output. (Push-Pull output power Pout=1.3W @ VDD=5V, THD+N=10%, F=1kHz, RL=4Ω.)
Nyquest Technology Co., Ltd. Address: 7F-1, No.81, Shuili Road, Hsinchu City 30059, Taiwan, R.O.C. Tel: +886-3-516 9077 Fax: +886-3-516 9076
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