![](http://datasheet.mmic.net.cn/40000/LC7872E_datasheet_1644991/LC7872E_10.png)
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CD-G Instructions
The LC7872E supports the following instructions that appear in the R to W subcodes as described in the CD Red Book.
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)
No. 4868-10/17
LC7872E
Pin No.
Symbol
I/O
Function
51
FSX
O
Error state monitor trigger
52
DEN
I
Disk information display enable pin
High: BGC
(pull-down resistor built in)
Low: Enable
53
PALID
I
Superimposition PAL mode external control (pull-up resistor built in)
54
HRESET
I
Horizontal timing external control
55
FSC
O
Subcarrier clock output
NTSC mode: 3.579545 MHz
PAL mode: 4.433619 MHz
56
VRESET
I
Vertical timing external control
57
RESET
I
Reset input
58
N/P1
I
NTSC/PAL selection
High: NTSC
(RGB encoder)
Low: PAL
59
N/P2
I
NTSC/PAL selection
High: NTSC
(CD-G decoder)
Low: PAL
60
SON
I
Superimposition on/off
61
XIN2
I
Crystal oscillator connection 17.734476 MHz (PAL)
62
XOUT2
O
Crystal oscillator connection 17.734476 MHz (PAL)
63
XIN1
I
Crystal oscillator connection 14.31818 MHz (NTSC)
64
XOUT1
O
Crystal oscillator connection 14.31818 MHz (NTSC)