SH7708中文资料瑞萨数据手册PDF规格书

SH7708 Series Features

The SH7708, SH7708S, and SH7708R(SH7708 Series) are 32-bit RISC (reduced instruction set computer) microcomputers, featuring object code upward-compatibility with SH-1 and SH-2 microcomputers. The SH7708R is completely pin compatible with the SH7708S. It includes an 8- kbyte cache with a choice of write-back or write-through mode, and an MMU (memory management unit) with a 128-entry 4-way set associative TLB (translation lookaside buffer).

The SH7708 Series has an on-chip bus state controller (BSC) that allows direct connection to DRAM, synchronous DRAM (SDRAM), and pseudo-SRAM (PSRAM) without external circuitry. Its 16-bit fixed-length instruction set enables program code size to be reduced by almost 50 compared with 32-bit instructions.