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1 Summary
The S1C17 Core is a Seiko Epson original 16-bit RISC-type processor.
It features low power consumption, high-speed operation with a maximum 60 MHz to 90 MHz clock, large address
space up to 16M bytes addressable, main instructions executable in one clock cycle, and a small sized design. The
S1C17 Core is suitable for embedded applications that do not need a lot of data processing power like the S1C33
Cores the high-end processors, such as controllers and sequencers for which an eight-bit CPU is commonly used.
The S1C17 Core incorporates a coprocessor interface allowing implementation of additional computing features.
Furthermore, Seiko Epson provides a software development environment similar to the S1C33 Family that includes
an IDE work bench, a C compiler, a serial ICE and a debugger, for supporting the developer to develop application
software.
1.1 Features
Processor type
• Seiko Epson original 16-bit RISC processor
• 0.35–0.15 µm low power CMOS process technology
Operating-clock frequency
• 90 MHz maximum (depending on the processor model and process technology)
Instruction set
• Code length:
• Number of instructions:
• Execution cycle:
• Extended immediate instructions: Immediate extended up to 24 bits
• Compact and fast instruction set optimized for development in C language
Register set
• Eight 24-bit general-purpose registers
• Two 24-bit special registers
• One 8-bit special register
Memory space and bus
• Up to 16M bytes of memory space (24-bit address)
• Harvard architecture using separated instruction bus (16 bits) and data bus (32 bits)
Interrupts
• Reset, NMI, and 32 external interrupts supported
• Address misaligned interrupt
• Debug interrupt
• Direct branching from vector table to interrupt handler routine
• Programmable software interrupts with a vector number specified (all vector numbers specifiable)
Power saving
• HALT (halt instruction)
• SLEEP (slp instruction)
Coprocessor interface
• ALU instructions can be enhanced
S1C17 CORE MANUAL
(Rev. 1.2)
16-bit fixed length
111 basic instructions (184 including variations)
Main instructions executed in one cycle
Seiko Epson Corporation
1 SUMMARY
1-1
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