DESCRIPTION
The µPD780031AY, 780032AY, 780033AY, and 780034AY are members of the µPD780034AY Subseries of the 78K/0 Series. This is a µPD780034A Subseries product with an added multimaster-supporting I2C bus interface, and is suitable for AV equipment applications. A flash memory version, the µPD78F0034AY, that can operate in the same power supply voltage range as the mask ROM version, and various development tools, are available.

FEATURES
• External memory expansion space: 64 Kbytes
• Minimum instruction execution time: 0.24 µs (@ fX = 8.38-MHz operation)
• I/O ports: 51 (5-V-tolerant N-ch open-drain: 4)
• 10-bit resolution A/D converter: 8 channels (AVDD = 1.8 to 5.5 V)
• Serial interface: 3 channels (multimaster-supporting I2C bus mode, UART mode, 3-wire serial I/O mode)
• Timer: 5 channels
• Power supply voltage: VDD = 1.8 to 5.5 V

APPLICATIONS
Telephones, home electric appliances, pagers, AV equipment, car audios, office automation equipment, etc.