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W78C374P Datasheet

  • W78C374P

  • MONITOR MICROCONTROLLER

  • 393.28KB

  • 38頁

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Preliminary W78E378/W78C378/W78C374
MONITOR CONTROLLER
GENERAL DESCRIPTION
The W78E378, W78C378 and W78C374B are ASIC which is a stand-alone high-performance
microcontroller specially designed for monitor control applications. The device integrates the
embedded 80C31 microcontroller core, on-chip MTP or Mask ROM, 576 bytes of RAM, and a number
of dedicated hardware monitor functions. Additional special function registers are incorporated to
control the on-chip peripheral hardware. The chip is used to control the interface signal of other
devices in the monitor and to process the video sync signals. Because of the highly integration and
Flash cell for program memory, the device can offer users the competitive advantages of low cost
and reduced development time.
FEATURES
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80C31 MCU Core Embedded
32K Bytes MTP-ROM (W78E378)
32K Bytes Mask-ROM (W78C378)
16K Bytes Mask-ROM (W78C374B)
Total 576 Bytes of On-chip Data RAM
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256 bytes accessed as in the 80C32
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320 bytes accessed as external data memory via "MOVX @Ri"
PWM DACs
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Eight 8-bit Static PWM DACs: DAC0鈭扗AC8
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Three 8-bit Dynamic PWM DACs: DAC9鈭扗AC10
Sync Processor
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Horizontal & Vertical Polarity Detector
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Sync Separator for Composite Sync
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12-bit Horizontal & Vertical Frequency Counter
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Programmable Dummy Frequency Generator
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Programmable H-clamp Pulse Output
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SOA Interrupt
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Hsync/2 Output
Serial Ports:
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DDC1 Port- support DDC1
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SIO1 & SIO2 Ports - each can support DDC2B/2B+/2Bi/2AB (each has 2 slave addresses)
Two 16-bit Timer/Counters (8031's Timer0 & Timer1)
One External Interrupt Input (8031's INT0 )
One Parabola Interrupt Generator
One ADC with 7 Multiplexed Analog Inputs
Two 12 mA(min) Output Pins for Driving LEDs
22
Watchdog Timer (2 /Fosc = 0.42s @Fosc = 10 MHz)
Power Low Reset
Frequency: 10 MHz max. (with the same performance as a normal 8051 that uses 20 MHz)
Packaged in 40/32-pin 600 mil DIP & 44-pin PLCC
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Publication Release Date: December 1999
Revision A1

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