Navigation system

Renesas has announced the SH77722 (SH-NaviJ2) as the second-phase product in the SH-NaviJ series, which are system on chip (SoC) products for compact portable navigation systems and low-end to middle-range dashboard-mounted car navigation systems.

The device features high performance, improved ease of use and miniaturisation.

A 32-bit bus for the DDR2 SDRAM memory interface allows the device to implement higher-speed graphics. Data transfer efficiency has been increased by doubling the bus width of the DDR2 SDRAM memory interface from 16 to 32 bits.

Two-screen displays are achieved by mainly doubling the bus width for DDR2 SDRAM. For example, this product can output a total of two screen displays of graphics and others in the WVGA size (832 x 496 pixels). (In case of one display only, SH77722 can output graphics and others in the maximum WXGA size [1280 x 768 pixels].)

One channel supports digital RGB output and the other channel includes an LVDS interface that provides low and high noise resistance and high-speed data transmission, which makes it possible to transmit image data to a remote monitor with a minimum number of lines.

The chip increases from one to two the number of CAN interface channels, which is the industry standard motor vehicle network. It now includes a media oriented systems transport (MOST) interface, which is the standard network for information systems.

The device is available in two versions, one with a 336 MHz maximum operating frequency and 600 million instructions per second processing performance, and one with a 400 MHz and 720 MIPS.