55214 MC145431

MC141543

Advanced Monitor On-Screen Display

This is a high performance HCMOS device designed to interface with a microcontroller unit to allow colored symbols or characters to be displayed on a color monitor. Its on-chip PLL allows both multisystem operation and self generation of system timing. It also minimizes the MCU‘s burden through its built-in 493 bytes RAM. By storing a fuli screen of data and control information, this device has a capability to carry out ’screen-refresh‘ without any MCU supervision.

w CO

5

k k k

SDA(MOSt)

SCUSCK)

54

ss i_IL

DATA R£CEIVER

-7pAfX- “*■ MEMORY AND DATA ~pA~

RA.CA.DA

^ MANAGEMENT

—z--

. WADDR _:1S WCOLOR

•- ;/-—+■ and

CONTROL

MCLK

BUS ARBITRAT10N LOGIC

ADDRC

tO

CC

2U-

/ Y

13

COLORS

NROW

ROW

BUFFER

AND SELECT ♦. CHS

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T

VFLB

I	VERTICAL	—ńr	---p. 6
CHS _J	CONTROL		/ 2
^8	CIRCUIT	' CH	L> O ▼ ▼
VERD			--► CHARACTER ROMS

—    * CWS

o *

a

o

RP

VCO

HORIZONTAL CONTROL AND PLL

HORD

10

HFLB

VDD(A) _ VSS(A) ⁴

VDD

VSS

16

SC

CCLK

/ |

od ^

S

¹ o &

_ł-1--*_T

10BITS SHIFT REGISTERS

*    ⁵    2

.    —    “3

o    tsi    cs

54 / WADDR

I BACKGROUND GENERATOR

W

	CU	LU
	u z	8
Z UJ a C/J	< 2 2	S u <
c	D	-J
	t-L	J^a -T

COLOR ENCODER

WCOLOR 15 AND - j CONTROL

13

COLORS AND SELECT

¹⁵ t 14 _T

!3, 12, ll_f

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