January 19, 2000
SX18AC/SX20AC/SX28AC/SX18AC75/SX20AC75/SX28AC75
Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability and On-Chip Debug
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PRODUCT OVERVIEW
Introduction
teristics enables the device to implement hard real-time functions as software modules (Virtual Peripheral™) to replace traditional hardware functions. On-chip functions include a general-purpose 8-bit timer with prescaler, an analog comparator, a brown-out detector, a watchdog timer, a power-save mode with multisource wakeup capability, an internal R/C oscillator, userselectable clock modes, and high-current outputs.
The Scenix SX family of configurable communications controllers are fabricated in an advanced CMOS process technology. The advanced process, combined with a RISC-based architecture, allows high-speed computation, flexible I/O control, and efficient data manipulation. Throughput is enhanced by operating the device at frequencies up to 50/75 MHz and by optimizing the instruction set to include mostly single-cycle instructions. In addition, the SX architecture is deterministic and totally reprogramable. The unique combination of these characO S C 1 O S C2
RT C C
O SC 8-bit W atchdog 8-bit T im er Clock D river RT C C T im er (W DT ) S elect 4M Hz Internal ÷ 4 or ÷ 1 RC OSC Interrupt Stack System C lock 8 M C LR Prescaler for R T CC P ow er-O n A nalog 3 or R eset Interrupt RE S ET M IW U P ort B C om p P rescaler for W DT B row n-O ut 8 8 8 M IW U S ystem C lock Internal D ata B us 8 8 8 8 8 8 8 8 W In-System PC D ebugging Port A Port C 3 Level 8 A LU FSR A ddress S tack Fetch In-S ystem 4 8 Instruction PC P rogram m ing Decode Pipeline 136 Bytes STATU S S R AM E xecutive 2k W ords A ddress 12 E E P RO M O PT IO N W rite Back MODE 8 W rite D ata R ead D ata 8 Instruction 12
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Figure 1-1. Block Diagram
Scenix™ and the Scenix logo are trademarks of Scenix Semiconductor, Inc. I2C™ is a trademark of Philips Corporation Micro...
SX28AC PDF File
