M37274EFSP datasheet(7/147 Pages) MITSUBISHI

Part #	M37274EFSP

Description	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER??????

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Manufacturer	MITSUBISHI [Mitsubishi Electric Semiconductor]

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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER

and ON-SCREEN DISPLAY CONTROLLER

M37274EFSP

PRELIMINARY

Notice:

This

is not

a final

specification.

Some

paramentic

limits

are

subject

to change.

MITSUBISHI MICROCOMPUTERS

Ports P63 and P64 are 2-bit input port.

Pin P63 is also used as OSD clock input pin OSC1.

Pin P64 is also used as OSD clock output pin OSC2. The output structure is CMOS output.

Pin P64 is also used as sub-clock output pin XCOUT. The output structure is CMOS output.

Pin P63 is also used as sub-clock input pin XCIN.

Ports P70–P72 are 3-bit input port.

Pins P70, P71 are also used as data slicer input pins CVIN, VHOLD respectively. When

using data slicer, input composite video signal through a capacitor. Connect a capacitor

between VHOLD and VSS.

Pins P72 pin is also used as input/output pin for data slicer RVCO. When using data slicer,

connect a resistor between RVCO and VSS.

When using data slicer, connect a filter using of a capacitor and a resistor between HLF

and VSS.

This is a horizontal synchronous signal input for OSD.

This is a vertical synchronous signal input for OSD.

PIN DESCRIPTION (continued)

Note : As shown in the memory map (Figure 5), port P0 is accessed as a memory at address 00C016 of zero page. Port P0 has the port P0

direction register (address 00C116 of zero page) which can be used to program each bit as an input (“0”) or an output (“1”). The pins

programmed as “1” in the direction register are output pins. When pins are programmed as “0,” they are input pins. When pins are

programmed as output pins, the output data are written into the port latch and then output. When data is read from the output pins, the

output pin level is not read but the data of the port latch is read. This allows a previously-output value to be read correctly even if the

output “L” voltage has risen, for example, because a light emitting diode was directly driven. The input pins float, so the values of the pins

can be read. When data is written into the input pin, it is written only into the port latch, while the pin remains in the floating state.

Name

Functions

Input/

Output

Analog input

Input

This is an analog input pin AD6.

I/O

Input/output for

data slicer

P63/OSC1/

XCIN,

P64/OSC2/

XCOUT

P70/CVIN,

P71/VHOLD,

P72/RVCO

HLF/AD6

HSYNC

VSYNC

Input port

Clock input for OSD

Clock output for OSD

Sub-clock output

Sub-clock input

Input port P7

Input for data slicer

HSYNC input

VSYNC input

Input

Output

Input

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M37274EFSP Datasheet(PDF) 7 Page - Mitsubishi Electric Semiconductor

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