Document
DATA SHEET
MOS INTEGRATED CIRCUIT
µPD6467
ON-SCREEN CHARACTER DISPLAY CMOS IC FOR 512-CHARACTER, 12-ROW, 28-COLUMN, CAMERA-CONTAINED VCR
The µPD6467 is a CMOS LSI for on-screen character display, and can be used in combination with a microcomputer to display the tape counter, time, and date in the view finder of a video camera, or the time of a video tape, messages such as dates on pictures, and channel number on a TV screen. Characters are displayed in 12 (horizontal) by 18 (vertical) dots. Two or more characters can be combined to display Kanji (Japanese characters) and symbols. This LSI supports color view finders and is provided with three sets of character output signals (RGB output: for color view finder, VC1 output: for recording (or monitor pin), VC2 output: for monitor pin (or recording)). In addition, the µPD6467 is also equipped with a power-ON clear function and a video RAM batch clear command so that it can mitigate the workload of the microcomputer. The command format of this LSI is identical to that of the existing models, the µPD6461, 6462 and 6466, and therefore, the µPD6467 is compatible with the existing models, and the software resources for the existing models can be used.
FEATURES
• Number of display characters • Types of character • Character size • Number of character colors • Framing • Dot matrix • Blinking : 12 rows, 28 columns (336 characters) : 512 types (ROM). Changeable by using mask code option. : Can be expanded up to four-fold in vertical and horizontal directions independently, in units of lines. : 8 colors : Framing or no framing, or white or black framing selectable in screen units. : 12 (horizontal) × 18 (vertical) dot configuration. No gap between adjacent characters. : Blinking can be turned ON/OFF in character units. The blinking ratio is 1:1. The blinking frequency can be selected from about 1 Hz, about 2 Hz, and about 0.5 Hz in screen unit. • Character color reversing function : The color of the character and that of the background can be reversed. • Character left and right reverse : Left and right can be reversed for display in character units. • Background • Blue back function • External dot clock input • Signal output : No background, blank background, or filled background selectable in screen units. : Blue or white can be selected as the background. : Frequency 2-divide function is selectable. : 3 sets (output (1) R, G, B + BLK/VC1 + VBLK1/VC2 + VBLK2 and output (2) R + RBLK/B + BBLK/G + GBLK selectable by command) When output (1) is selected, VC1 and VC2 outputs can be selected from three types. • Video RAM data clear : Implemented by video RAM batch clear command or by clear function on power-ON.
The information in this document is subject to change without notice. Before using this document, please confirm that this is the latest version. Not all devices/types available in every country. Please check with local NEC representative for availability and additional information. Document No. S14455EJ1V0DS00 (1st edition) Date Published November 1999 N CP(K) Printed in Japan
©
1999
µPD6467
• Interface with microcomputer • Supply voltage • Process • Small package size : 8-bit variable word length serial input (LSB first/MSB first selectable by command) : Supports low voltage (2.0 to 3.6 V) : CMOS low power consumption : 20-pin plastic shrink SOP (225 mil)
ORDERING INFORMATION
Part Number Package 20-pin plastic shrink SOP (225 mil)
µPD6467GR-xxx
Remarks 1. NEC’s standard model is the µPD6467GR-001. For the details of the character generator ROM, refer to 5. CHARACTER PATTERNS. 2. xxx indicates a ROM code suffix.
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Data Sheet S14455EJ1V0DS00
BLOCK DIAGRAM
CMDCT 6 DATA 3 CLK 1 CS 2 Data input shift register
9 TEST 5 VDD
...
Instruction decoder
Control signals
10 GND 4 PCL
Data selector
Display control register
Character size register
Horizontal address register
Write address counter
Video RAM
Horizontal size counter
Horizontal position counter
Horizontal address counter
Blink Reverse Character Color Output data data data data specification 3 bits 1 bit 1 bit 9 bits data 1 bit × × × × × 336 words 336 words 336 words 336 words 336 words
Background control data register
Data Sheet S14455EJ1V0DS00
OSCIN OSCOUT
8 7
Oscillation circuit Vertical address register
Character generator ROM 12×18 bits × 512 words
Vertical address counter
Hsync 20
Vsync 19
Synchronization protection circuit
Vertical size counter
Vertical position counter
Output controller
µPD6467
16 17 18 15 VR VG VB VBLK (BBLK)
14 13 12 11 VC1 BLK1 VC2 BLK2 (GBLK) (RBLK)
Remark Signals in ( ) are set by using an initial status setting command (RGB + RGB compatible blanking).
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µPD6467
PIN CONFIGURATION (Top View)
20-pin plastic shrink SOP (225 mil)
µPD6467GR-xxx
CLK CS DATA PCL VDD CMDCT OSCOUT OSCIN TEST GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
Hsync Vsync VB VG VR VBLK (BBLK) VC2 (GBLK) BLK2 (RBLK) VC1 BLK1
Remarks 1. xxx indicates a ROM code s.