M37225M6_15 datasheet(65/128 Pages) RENESAS

Part #	M37225M6

Description	SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

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Manufacturer	RENESAS [Renesas Technology Corp]

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65 / 128 page

M37225M6/M8/MA/MC-XXXSP, M37225ECSP

Rev.1.00

Nov 01, 2000

page 63 of 124

REJ03B0136-0100Z

The horizontal display start position is common to all blocks, and can

be set in 64 steps (where 1 step is 4TOSC, TOSC being the OSD

oscillation cycle) as values “0016” to “3F16” in the block H register

(address 00E016). The block H register is shown in Figure 8.10.13.

Fig. 8.10.13 Block H Register

b7b6b5b4b3b2b1b0

Horizontal position register (HP) [Address 00E016]

BName

Functions

Block H Register

Control bits of horizontal

display start positions

(BHP0 to BHP5)

(See note 1)

0

to

5

Note: The setting value synchronizes with the VSYNC.

6, 7 Nothing is assigned. These bits are write disable bits.

When these bits are read out, the values are “0.”

After reset RW

0R W

0R —

Horizontal display start positions = Tdef1 + 4TOSC ✕ n

(n: setting value, Tdef1: 31TOSC,

TOSC: OSD oscillation cycle)

Fig. 8.10.12 Notes on Vertical Display Start Position

Nv

:Value of block V register i

(decimal)

Hdef :17H

VSYNC

(When setting “0116” to block i V register, vertical display start position for each mode)

screen

HSYNC

Hdef

NV

1

2

3

17

18

OSD mode

BUTTON mode

Vertical display start position

When bits 0 and 1 of OSD I/O polarity register (address 00EB16) are “1” (negative polarity)

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