MC141543 Datasheet, PDF (1/14 Pages) Motorola, Inc – Advanced Monitor On-Screen Display

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Advanced Monitor On-Screen
Display
CMOS
The MC141543 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. The on–chip PLL allows both multi–system
operation and self–generation of system timing. It also minimizes the MCU’s
burden through its built–in 493 bytes RAM. By storing a full screen of data and
control information, this device has a capability to carry out ‘screen–refresh’
without MCU supervision.
Since there is no spacing between characters, special graphics–oriented
characters can be generated by combining two or more character blocks. There
are three different resolutions that users can choose. By changing the number
of dots per horizontal line to 320 (CGA), 480 (EGA) or 640 (VGA), smaller
characters with higher resolution can be easily achieved.
Special functions such as character bordering or shadowing, multi–level
windows, double height and double width, and programmable vertical length of
character can also be incorporated. Furthermore, neither massive information
update nor extremely high data transmission rate are expected for normal on–
screen display operation, and serial protocols are implemented in lieu of any
parallel formats to achieve minimum pin count.
• Three Selectable Resolutions: 320 (CGA), 480 (EGA) or 640 (VGA) Dots
per Line
• Fully Programmable Character Array of 15 Rows by 30 Columns
• 493 Bytes Direct Mapping Display RAM Architecture
• Internal PLL Generates a Wide–Ranged System Clock
• For High–End Monitor Application, Maximum Horizontal Frequency is
110 kHz (70.4 MHz Dot Clock at 640 Mode)
• Programmable Vertical Height of Character to Meet Multi–Sync
Requirement
• Programmable Vertical and Horizontal Positioning for Display Center
• 128 Characters and Graphic Symbols ROM (Mask ROM is Optional)
• 10 x 16 Dot Matrix Character
• Character–by–Character Color Selection
• A Maximum of Four Selectable Colors per Row
• Double Character Height and Double Character Width
• Character Bordering or Shadowing
• Three Fully Programmable Background Windows with Overlapping
Capability
• Provides a Clock Output Synchronous to the Incoming H Sync for External
PWM
• M_BUS (IIC) Interface with Address $7A
• Single Positive 5 V Supply
Order this document
by MC141543/D
MC141543
P SUFFIX
PLASTIC DIP
CASE 648
ORDERING INFORMATION
MC141543P Plastic DIP
PIN ASSIGNMENT
VSS(A) 1
VCO 2
RP 3
VDD(A) 4
HFLB 5
SS 6
SDA(MOSI) 7
SCL(SCK) 8
16 VSS
15 R
14 G
13 B
12 FBKG
11
HTONE/
PWMCK
10 VFLB
9 VDD
REV 2
2/97 TN97022700
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MC141543
1