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DESCRIPTION

The μPD784927 and 784928 are members of the NEC 78K/IV Series of microcontrollers equipped with a high-speed, high-performance 16-bit CPU for VCR software servo control.

The μPD784927Y and 784928Y are based on the μPD784928 with the addition of an I2C bus interface compatible with multi-master.

They contain many peripheral hardware units ideal for VCR control, such as a multi-function timer unit (super timer unit) for software servo control and VCR analog circuits.

FEATURES

? High instruction execution speed realized by 16-bit CPU core

? Minimum instruction execution time: 250 ns (with 8 MHz internal clock)

? High internal memory capacity

? VCR analog circuits conforming to VHS Standard

? CTL amplifier ? DFG amplifier ? Reel FG comparator (2 channels)

? RECCTL driver (rewritable) ? DPG amplifier ? CSYNC comparator

? CFG amplifier ? DPFG separation circuit (ternary separation circuit)

? Timer unit (super timer unit) for servo control

? Serial interface : 3 channels

? 3-wire serial I/O : 2 channels

? I2C bus interface: 1 channel

? A/D converter: 12 channels (conversion time: 10 μs)

? Low-frequency oscillation mode: main system clock frequency = internal clock frequency

? Low-power consumption mode: CPU can operate with a subsystem clock.

? Supply voltage range: VDD = +2.7 to 5.5 V

? Hardware watch function: watch operation at low voltage (VDD = 2.7 V (MIN.)) and low current consumption

APPLICATION FIELDS

Stationary VCR, video camera, In-TV VCR