M37274EFSP datasheet(48/148 Pages) RENESAS

Part #	M37274EFSP

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

PDF	148 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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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

(8) Clock run-in determination circuit

This circuit sets a window in the clock run-in portion in the composite

video signal, and then determinates clock run-in by counting the

number of pulses in this window. Set the time from a falling of the

horizontal synchronizing signal to a start of the window by bits 0 to 5

of the window register (address 00E216; refer to Figure 43). The

window ends according to the contents of the setting of the start bit

position register (refer to Figure 40).

Fig. 43. Window Register

b7 b6 b5 b4 b3 b2 b1 b0

Window register (WN) [Address 00E2 16]

Window Register

0R W

Window start time

(WN0 to WN5)

6, 7 Fix these bits to “0.”

After reset

Functions

Name

Time from a falling of the horizontal

synchronous signal to start of the

window =

4 ! set value (“0016” to “3F16”) !

reference clock period

M37274EFSP Datasheet(PDF) 48 Page - Renesas Technology Corp