CD-EG Instructions
Of the instructions in the R to W subcode described in the CD Red Book, the LC7871E and the LC7871NE support the
following:
1. MODE = 0, ITEM = 0: ZERO mode
2. MODE = 1, ITEM = 0: LINE GRAPHICS mode
Write FONT instruction (4)
Write Scroll SCREEN instruction (12)
3. MODE = 1, ITEM = 1: TV-GRAPHICS mode
Preset MEMORY instruction (1)
Preset BORDER instruction (2)
Write FONT FOREGROUND/BACKGROUND instruction (6)
Scroll SCREEN with preset instruction (20)
Scroll SCREEN with Copy instruction (24)
Load CLUT color-0...7 instruction (30)
Load CLUT color-8...15 instruction (31)
EXCLUSIVE-OR FONT instruction (38)
Define color Transparency instruction (28)
4. MODE = 1, ITEM = 1 & 2: EXTENDED TV-GRAPHICS mode
MEMORY Control instruction (3)
Write additional FONT FOREGROUND/BACKGROUND instruction (6)
EXCLUSIVE-OR additional FONT with 2 colors instruction (14)
Load CLUT color instruction (16-47)
Load CLUT additional color instruction (48-63)
Pin Applications
1. Crystal Clock Oscillator: Pins XIN1, XOUT1, XIN2, XOUT2, N/P1, N/P2, FSC, CSYNC, 2FSC and VSYNC
The XIN1 and XOUT1 pins are for use with a 14.31818 MHz (NTSC) crystal oscillator. The XIN2 and XOUT2 pins
are for use with a 17.734476 MHz (PAL) crystal oscillator. The LC7871E and LC7871NE provide the above two
crystal oscillator systems. Depending on the application, either a single crystal can be connected, or alternatively two
crystals can be used allowing control from both the N/P1 and the N/P2 pins. The N/P1 pin switches the RGB encoder
block between PAL and NTSC and the N/P2 pin switches the CD-G decoder block between PAL and NTSC. The
FSC and 2FSC pins output the crystal oscillator frequency divided by 4 and 2 (2/5 in PAL mode) respectively. The
CSYNC pin outputs a composite sync signal, and the VSYNC pin outputs a vertical sync signal.
The table below shows the pin outputs in the various modes.
No. 4861-11/19
LC7871E, 7871NE
XIN1, XOUT1
XIN2, XOUT2
N/P1
N/P2
TV Standard
FSC
2FSC
CSYNC
14.31818 MHz
*
H
NTSC/M
3.579545 MHz
7.15909 MHz
16.65155767 ms
*
17.734476 MHz
L
PAL/GBIDH
4.433619 MHz
7.093790 MHz
20.09588555 ms
14.30244 MHz
*
L
H
PAL/M
3.575611 MHz
7.15122 MHz
16.6698829 ms