MC141541P Motorola, MC141541P Datasheet

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MC141541P

Manufacturer Part Number
MC141541P
Description
Enhanced monitor on-screen display
Manufacturer
Motorola
Datasheet

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MOTOROLA
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Enhanced Monitor On-Screen
Display
CMOS
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 273 bytes display/control RAM. By storing a full
screen of data and control information, this device has the capability to carry out
‘screen–refresh’ without MCU supervision.
characters can be generated by combining two or more character blocks. There
are two different resolutions that users can choose. By changing the number of
dots per horizontal line to 320 (CGA) or 480 (EGA), smaller characters with
higher resolution can be easily achieved.
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.
enhanced version (EMOSD). Users can download their own fonts and display
them at any time once the chip is powered on. There are two ways for users to
build and store fonts. One is a conventional approach to have masked ROM
fonts. A newer approach is to store the fonts in the EPROM accessed by the
MCU and then download them into the EMOSD character RAM. With this new
technique, users have more flexibility in preparing their fonts and the effective
number of fonts is greatly increased.
REV 1
2/97
The MC141541 is a high performance HCMOS device designed to interface
Since there is no spacing between characters, special graphics–oriented
Special functions such as character bordering or shadowing, multi–level
A special feature, character RAM fonts, is implemented in this MOSD
Motorola, Inc. 1997
Two Selectable Resolutions: 320 (CGA) and 480 (EGA) Dots per Line
Fully Programmable Character Array of 10 Rows by 24 Columns
273 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 (52.8 MHz Dot Clock at 480 Mode)
Programmable Vertical Height of Character to Meet Multi–Sync
Requirement
Programmable Vertical and Horizontal Positioning for Display Center
120 Characters and Graphic Symbols ROM and Eight Programmable
Character RAM
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
TN97031200
SDA(MOSI)
SCL(SCK)
ORDERING INFORMATION
V DD(A )
MC141541
V SS(A)
MC141541P
HFLB
VCO
RP
SS
PIN ASSIGNMENT
1
2
3
4
5
6
7
8
Order this document
Plastic DIP
PLASTIC DIP
16
15
14
13
12
10
11
9
CASE 648
P SUFFIX
by MC141541/D
MC141541
V SS
R
G
B
FBKG
HTONE/
PWMCK
VFLB
V DD
1

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MC141541P Summary of contents

Page 1

... 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 REV 1 2/97 TN97031200 MOTOROLA Motorola, Inc. 1997 Order this document by MC141541/D MC141541 P SUFFIX PLASTIC DIP CASE 648 ORDERING INFORMATION MC141541P Plastic DIP PIN ASSIGNMENT V SS( VCO DD(A ) ...

Page 2

... CCOLORS AND SELECT Î Î Î Î Î ROW CHS BUFFER Î Î Î Î Î CWS Î Î Î Î Î 6 CRADDR CRS 10–BIT SHIFT REGISTERS 13 CCOLORS COLOR ENCODER AND SELECT MOTOROLA ...

Page 3

... Input Voltage of Pin SDA and SCL in M_BUS Mode V IL Logic Low V IH Logic High I II High–Z Leakage Current ( and FBKG Input Current (Not Including RP, VCO FBKG and HTONE/PWMCK Supply Current (No Load on Any Output) 90% MOTOROLA Value Unit – – – 150 DD( ...

Page 4

... After the full–screen display data is received through one of the serial communication interfaces, the link can be terminated if a change of the display is not required. MOTOROLA ...

Page 5

... RAM is on the segment–line basis. Although the address basis is different, the data downloading proto- cols are very similar and will be described in the following sections. MOTOROLA Display RAM and Control Registers After the proper identification by the receiving device, a data train of arbitrary length is transmitted from the master. ...

Page 6

... Hence not neces- sary to load a row of blank data to compensate for the double row. The user should minimize excessive rows of data in BIT FORMAT don’t care D: valid data MEMORY MANAGEMENT COLUMN 23 24... DISPLAY REGISTERS WINDOW 3 FRAME CRTL REG Figure 8. Memory Map MOTOROLA ...

Page 7

... Character RAM/ROM The RAM fonts occupy the font numbers $00 to $07, and their patterns can be changed at any time via the SPI or M_BUS protocol. The masked ROM fonts are fixed and lo- cated from number $08 to $7F. See Figure 9 for details. MOTOROLA FONT NUMBER: $00 – $ ...

Page 8

... COL END ADDR LSB Row 10 Coln ROW START ADDR ROW END ADDR MSB LSB LSB Row 10 Coln COL START ADDR VPOL WEN CCS1 LSB Row 10 Coln COL END ADDR LSB Row 10 Coln ROW START ADDR ROW END ADDR LSB LSB MSB MOTOROLA ...

Page 9

... TB TB CH5 CH4 CH3 CH2 Î Î Î Î Î Î Î Î Î Î Î Î MOTOROLA Bit 7 TB — Reserved test bit. Bit 6 TB — Reserved test bit Bit 5–0 CH5–CH0 — These six bits determine the dis- PWMCK_EN played character height ...

Page 10

... Figure 12. Display Frame Format variable number of H scan lines Ï Ï Ï Ï Î Î Î Î MOTOROLA ...

Page 11

... Figure 13. Timing of Output Signals as a Function of Window and FBKGC Bit Features MOTOROLA FONT Icon Combination MC141541 contains 120–character ROM and eight RAM. The user can create an on–screen menu based on those characters and programmable RAM ...

Page 12

... Figure 14. ROM Address ($08 – $1F) MC141541 Figure 15. ROM Address ($20 – $3F MOTOROLA ...

Page 13

... Figure 16. ROM Address ($40 – $5F) MOTOROLA Figure 17. ROM Address ($60 – $7F MC141541 13 ...

Page 14

... DESIGN CONSIDERATIONS Distortion Motorola’s MC141541P has a built–in PLL for multi–sys- tem application. Pin 2 voltage is dc–based for the internal VCO in the PLL. When the input frequency (HFLB) to Pin 5 increases, the VCO frequency will increase accordingly. This forces the PLL to a higher locked frequency output. The fre- quency should be equal to 320/480 x HFLB (depending on resolution) ...

Page 15

... 0.25 (0.010) MOTOROLA PACKAGE DIMENSIONS P SUFFIX PLASTIC DIP CASE 648– SEATING –T– PLANE NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. ...

Page 16

... Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “ ...

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