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LC7874E Datasheet

  • LC7874E

  • CMOS LSI

  • Sanyo

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Ordering number : EN5521
CMOS LSI
LC7874E
CD Graphics Decorder
Overview
The LC7874E is a CMOS LSI that provides the signal
processing needed for compact disc graphics (CD-G) on a
single chip. The LC7874E accepts subcode R to W
signals output from a CD player DSP LC786X Series,
LC7862XE Series, or LC7863XE Series device, and
performs de-interleaving, error detection and correction,
graphic instruction processing, and image processing.
鈥?Has microcomputer interface functions, allowing set
upgrading.
鈥?Provides superimposition support.
鈥?Has a color bar signal output function.
鈥?DRAM interface and RGB output and sync signal output
are 3-state outputs.
Package Dimensions
unit: mm
Features
鈥?A CD-G decoder can be configured using a three-chip
combination of this LSI鈥攖he LC7874E鈥攚ith external
RAM (64K
脳
4 bits) and an LC78010E digital RGB
encoder.
鈥?Performs insertion and protection of CD subcode R to
W sync signals and detection of R to W signal de-
interleave error signals.
鈥?Has two crystal oscillators, for NTSC and PAL, with
simple switchover by means of a control pin.
Connecting a crystal resonator of 14.31818 MHz for
NTSC and 17.734476 MHz for PAL enables the
standard clock and other necessary timings to be
generated internally.
鈥?Performs CD graphics instruction processing and
drawing functions, and controls image display.
鈥?CCB is a trademark of SANYO ELECTRIC CO., LTD.
鈥?CCB is SANYO鈥檚 original bus format and all the bus
addresses are controlled by SANYO.
3159-QFP64E
[LC7874E]
SANYO: QIP64E
Specifications
Electrical Characteristics
at Ta = 鈥?0擄C to +85擄C
Parameter
Power supply voltage
Symbol
V
DD
V
IN
V
DD
S1, S2, SFSY, PW, SBSY, CE, DI, CL, MUTE, DB0 to 3,
Input voltage
CB, CE1, CE2, CE3, LINE, HRESET, VRESET, INIT,
RESET, N/P, SON, XIN1, XIN2
SBCK, DO, CDGM, WE, RAS, A0 to 7, DB0 to 3, CAS, OE,
Output voltage
V
OUT
Pd max
Topr
Tstg
ROUT0 to 3, GOUT0 to 3, BOUT0 to 3, HSYNC, CSYNC,
BLANK, YS, 4FSCO, EFLG, FSCO, XOUT1, XOUT2
Allowable power dissipation
Operating temperature
Storage temperature
Ta = 25擄C
500
鈥?0 to +85
鈥?0 to +125
mW
擄C
擄C
V
SS
鈥?0.3 to V
DD
+0 .3
V
V
SS
鈥?0.3 to V
DD
+ 0.3
V
Conditions
Ratings
V
SS
鈥?0.3 to V
SS
+ 7.0
Unit
V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
13097HA(OT) No. 5521-1/22

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