LC7874E

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. Has microcomputer interface functions, allowing set upgrading. Provides superimposition support. Has a color bar signal output function. DRAM interface and RGB output and sync signal output are 3-state outputs. Package Dimensions unit: mm Features A CD-G decoder can be configured using a three-chip combination of this LSI—the LC7874E—with external RAM (64K × 4 bits) and an LC78010E digital RGB encoder. Performs insertion and protection of CD subcode R to W sync signals and detection of R to W signal deinterleave error signals. 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. Performs CD graphics instruction processing and drawing functions, and controls image display. CCB is a trademark of SANYO ELECTRIC CO., LTD. CCB is SANYO’s original bus format and all the bus addresses are controlled by SANYO. 3159-QFP64E ...