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PDF UPD6464A Data sheet ( Hoja de datos )

Número de pieza UPD6464A
Descripción ON-SCREEN CHARACTER DISPLAY CMOS LSI FOR 12-LINE/ 24-COLUMN DECK-TYPE VCR
Fabricantes NEC 
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DATA SHEET
MOS INTEGRATED CIRCUIT
µPD6464A,6465
ON-SCREEN CHARACTER DISPLAY CMOS LSI FOR 12-LINE,
24-COLUMN DECK-TYPE VCR
The µPD6464A,6465 are CMOS LSIs for on-screen character display that control various display systems (such
as tape counters) including the program screens of deck-type VCRs and LD players. These LSIs are used in
combination with a microcomputer.
It can display characters each consisting of 12 (horizontal) by 18 (vertical) dots. Some chinese characters and
some pictograms can also be displayed by combining two or more characters.
The µPD6464A,6465 include a power-ON clear function and a video RAM batch clear command that mitigate the
workload of the host microcomputer. It also has a synchronization separator and a ×4 multiplier on chip, eliminating
the need of connecting an external separator IC and a crystal resonator, which reduces the mounting area and the
total cost.
FEATURES
• Video signal input/output
• Number of display characters
• Number of character types
• Character size
• Character color
• Background
• Dot matrix
• Blinking
• Character signal output:
• Video RAM data clear
• Supported video signal method
• Internal circuit
• Interface with microcomputer
• Supply voltage
: Composite video signal
: 12 lines, 24 columns (288 characters)
: 128 (µPD6464A)/256 (µPD6465) (ROM). Variable by mask code option.
: 1 dot/1 line. 2 lines (field) can be displayed in line units.
: White (single color)
: No background, black framing, black-on-white, and black filling
: 12 (horizontal) × 18 (vertical) dots without gap between adjacent characters
: Blinking can be turned ON/OFF in character units. Blinking ratio is 1:1.
Blinking frequency is selectable from about 0.5 Hz, 1 Hz, and 2 Hz in screen
units.
: Can support VCRs with S pins if external mixer is connected because
character signal and blanking signal output pins are provided.
: Video RAM data are cleared by video RAM clear command and power-ON
clear function.
: NTSC/PAL/PAL-M/SECAM/PAL-N (µPD6464A only)
: Synchronization separation circuit for composite synchronizing signal and ×4
multiplier
: Serial input type of 8-bit variable word length
: +5 V, single power supply
ORDERING INFORMATION
Part Number
µPD6464ACS-×××
µPD6465CS-×××
µPD6464AGT-×××
µPD6465GT-×××
Package
24-pin plastic shrink DIP (300 mil)
24-pin plastic shrink DIP (300 mil)
24-pin plastic SOP (375 mil)
24-pin plastic SOP (375 mil)
Remark ××× : ROM code suffix (CS-001, GT-101 : NEC standard device)
The information in this document is subject to change without notice.
Document No. S11043EJ4V0DS00 (4th edition)
Date Published May 1998 N CP(K)
Printed in Japan
The mark shows major revised points.
©
1995, 1996

1 page




UPD6464A pdf
CONTENTS
µPD6464A,6465
1. COMMANDS ....................................................................................................................................
1.1 Command Format .................................................................................................................
1.2 Command List .......................................................................................................................
1.3 Power-ON Clear Function ....................................................................................................
7
7
7
8
2. COMMAND DETAILS ..................................................................................................................... 8
2.1 Video RAM Batch Clear Command ..................................................................................... 8
2.2 Display Control Command ................................................................................................... 9
2.3 Internal Video Signal Color Control Command .................................................................. 10
2.4 Background Control Command ........................................................................................... 10
2.5 Internal/external Mode Control, Crystal Oscillation Control Command .......................... 14
2.6 Video Signal Method Control Command ............................................................................ 15
2.7 Oscillation Method Control Command ............................................................................... 16
2.8 Display Position Control Command .................................................................................... 17
2.9 Write Address Control Command ....................................................................................... 19
2.10 Output Level Control Command .......................................................................................... 20
2.11 Character Size Control Command ....................................................................................... 21
2.12 Test Mode Command ............................................................................................................ 22
2.13 Display Character Control Command (2-byte contiguous command) ............................ 22
3. TRANSFERRING COMMANDS ..................................................................................................... 23
3.1 1-Byte Command .................................................................................................................. 23
3.2 2-Byte Command .................................................................................................................. 23
3.3 2-Byte Contiguous Command ............................................................................................. 23
3.4 Successive Command Input ................................................................................................ 24
3.4.1 When 2-byte contiguous command end code is not used ..................................... 24
3.4.2 When 2-byte contiguous command end code is used ............................................ 24
3.5 BUSY Period for Command Input ........................................................................................ 25
3.5.1 When inputting 1-byte or 2-byte command .............................................................. 25
3.5.2 When inputting 2-byte contiguous command .......................................................... 25
4. ADJUSTING ..................................................................................................................................... 27
4.1 Adjusting Oscillation Frequency ......................................................................................... 27
4.1.1 Adjusting ×4 multiplier and crystal oscillation frequency ...................................... 27
4.1.2 Adjusting LC oscillation frequency (dot clock) ....................................................... 27
4.2 Test Mode Clear Command .................................................................................................. 28
4.3 Clamp Level of Video Signal ................................................................................................ 28
5. COMPOSITE SYNC. SIGNAL SEPARATION CIRCUIT ................................................................. 30
6. CHARACTER PATTERN DATA .................................................................................................... 32
6.1 Standard Character Patterns of the µPD6464A .................................................................. 33
6.2 Standard Character Patterns of the µPD6465 .................................................................... 36
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UPD6464A arduino
µPD6464A,6465
• Background control bits
These bits select the type of background in screen units from none, black-framed, black-on-white, or black-filled
background.
No background : Only character data are output.
Black framing
: If the left- and rightmost columns or the top and bottom lines of a dot matrix are not used, the
displayed character can be framed horizontally, vertically, or diagonally. When the dots on the
rightmost or leftmost column of the dot matrix are used, a frame is displayed in the adjacent
character display areas. Even when the dots on the top and bottom lines of the dot matrix are
used, the lines above and below the dot matrix are not framed. Even if the character size is
changed, the size of black framing is fixed to 1 dot, which is the minimum size.
Black-on-white : A black background is displayed on the rightmost and leftmost positions of the display area
of the character written to the video RAM with 1 extra dot, which is the minimum size, at
both positions.
Black filling
: A black background is displayed outside the character display area, in addition to the black-
on-white background.,
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