Renesas' new H8SX/1650, part of its family of 32-bit CISC microcontrollers, is a ROMless device that is claimed to achieve an excellent balance between cost and performance, enabling high-performance systems at lower cost than alternative chips. The H8SX/1650 delivers 35 DMIPS and achieves a maximum operating frequency of 35 MHz with a minimum instruction execution time of 28,6 ns. It offers 24 Kbyte of RAM and a useful set of peripheral functions. These include an external bus state controller (BSC), a data transfer controller (DTC, a flexible alternative to a DMA controller), and a six channel timer pulse unit (TPU) with a rich set of features such as input capture, output compare and PWM output. To simplify peripheral device connectivity, the H8SX architecture incorporates a function for converting data to little-endian format. It also features an address/data multiplex bus I/O interface that can be set independently for each area of the partitioned address space to access an external device. These enhancements reduce the software load and allow system designers to build up systems that have fewer external parts.
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