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