83C145 datasheet(18/40 Pages) PHILIPS

18 / 40 page

1996 Mar 22

Philips Semiconductors

Product speciﬁcation

Microcontrollers for TV and video (MTV)

83C145; 83C845

83C055; 87C055

13.4

Character Generator ROM

Character Generator ROM. Containing 60 displayable bit

maps, i.e. 64 minus 4, comprising:

• One for each of new line: New Line, and

• Three space characters:

– Space

– BSpace

– SplitBSpace.

Each bit map includes 18 scan lines by 14 dots.

The Character Generator ROM is maskable or

programmable along with the Program ROM to allow for

various character sets and languages.

13.5

Display RAM organization

Each Display RAM location includes:

• 6 data bits, and

• 4 attribute bits.

The 6 data bits from Display RAM, along with a

line-within-row count, act as addresses into the Character

Generator ROM. Except in special test modes that are

beyond the scope of this data sheet, Display RAM cannot

be read by the MCU program.

Fig.7 OSD block diagram.

dbook, full pagewidth

MBG323

CHARACTER

GENERATOR

ADDRESS LOGIC

CHARACTER

GENERATOR

× 18 × 14

RGB

DIGITAL

VIDEO OUT

OSD RAM

128

× 10

ATTRIBUTE

CONTROL

OSD LOGIC

HSYNC

VSYNC

VCLK2

VCLK1

internal

bus

VCTRL

VID2

VID0

VID1

83C145 Datasheet(PDF) 18 Page - NXP Semiconductors

83C145 Datasheet(HTML) 18 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

Datasheet Download

Link URL