NT68P62-01, NT68P81, NT68R61A

The NT68P62 is a new generation of monitor mC for autosync and digital control applications. Particularly, this chip supports various and efficient functions to allow users to easily develop USB monitors. It contains the 6502 8-bit CPU core, 512 bytes of RAM used as working RAM and stack area, 32K bytes of OTP ROM, 13-channel of 8-bit PWM D/A converters, 4-channel A/D converters for keys detection which can save I/O pins, one 8-bit pre-loadable base timer, internal Hsync and Vsync signals processor, and a watch-dog timer which prevents the system from abnormal operation and two I2C bus interface. The user can store EDID data in the 128 bytes of RAM for DDC1/2B, so that user can reduce a dedicated EEPROM for EDID.

And Half frequency output function can save external oneshot circuit. All of these designs are committed to offer our user saving component cost. The 42 pin S-DIP IC provides two additional I/O pins – port40 & port41, Part number NT68P62U represents the S-DIP IC. For future reference, port40 & port42 is only available for the 42 pin S-DIP IC.

NT68P62-01 Features

■ Operating voltage range: 4.5V to 5.5V
■ CMOS technology for low power consumption
■ 6502 8-bit CMOS CPU core
■ 8 MHz operation frequency
■ 32K bytes of OTP (one time programming) ROM
■ 512 bytes of RAM
■ One 8-bit base timer
■ 13 channels of 8-bit PWM outputs with 5V open drain
■ 4 channel A/D converters with 6-bit resolution
■ 25 bi-directional I/O port pins (8 dedicated I/O pins)
■ Hsync/vsync signals processor for separate & composite signal, including hardware sync signals polarity detection and freq. counters with 2 sets of Hsync counting interval
■ Hsync/Vsync polarity controlled output, 5 selectable free run output signals and self-test patterns, automute function, half freq. I/O function
■ Two built-in I²C bus interfaces support VESA DDC1/2B+
■ Two layers of interrupt management
    NMI interrupt sources
        - INTE0 (External INT with selectable edge trigger)
        - INTMUTE (Auto Mute Activated)
    IRQ interrupt sources
        - INTS0/1 (SCL Go-low INT)
        - INTA0/1 (Slave Address Matched INT)
        - INTTX0/1 (Shift Register INT)
        - INTRX0/1 (Shift Register INT)
        - INTNAK0/1 (No Acknowledge)
        - INTSTOP0/1 (Stop Condition Occurred INT)
        - INTE1 (External INT with Selectable Edge Trigger)
        - INTV (VSYNC INT)
        - INTMR (Base Timer INT)
        - INTADC (AD Conversion Done INT)
■ Hardware watch-dog timer function
■ 40-pin P-DIP and 42-pin S-DIP packages

NT68P62-01 Connection Diagram

NT68P81 General Description

The NT68P81 is a single chip micro-controller for USB keyboard applications. It incorporates a 6502C 8-bit CPU core, 6K bytes of OTP ROM, and 256 bytes of RAM used as working RAM and stack area. It also includes 29 programmable bi-directional I/O pins with built-in resistors, and one 8-bit pre-loadable base timer.

Additionally, it includes a built-in power-on reset, a builtin low voltage reset, an oscillator that requires crystal or ceramic resonator applied, and a watch-dog timer that prevents system standstill.

NT68P81 Maximum Ratings

DC Supply Voltage . . . . . . . . . . . . . . . . . . -0.3V to +7.0V
Input/Output Voltage . . . . . . . GND - 0.2V to VDD + 0.2V
Operating Ambient Temperature . . . . . . . . .0 ℃ to 70 ℃
Storage Temperature . . . . . . . . . . . . . .-55 ℃ to +125 ℃
Operating Voltage (V_DD) . . . . . . . . . . . .+4.4V to +5.25V

NT68P81 Features

■ Built-in 6502C 8-bit CPU
■ 3 MHz CPU operation frequency when oscillator is running at 6 MHz
■ 6K bytes of OTP (one time programming) ROM
■ 256 bytes of SRAM
■ One 8-bit programmable base timer with pre-divider circuit
■ 29 programmable bi-directional I/O pins including two external interrupts
■ 3 LED direct sink pins with internal serial resistors
■ On-chip oscillator (Crystal or Ceramic Resonator)
■ Watch-dog timer reset
■ Built-in power-on reset
■ USB interface
■ 3 supported endpoints
■ Remote wakeup provided
■ CMOS technology for low power consumption
■ 40-pin DIP package, 42-pad Dice form and COB

NT68P62-01, NT68P81, NT68R61A

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