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We welcome your feedback. Most Current Data Sheet. To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at: You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page.
The last character of the literature number is the version number, e. An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current. The errata will specify the revision. To determine if an errata sheet exists for a particular device, please check with datasjeet of the following: Esapol contacting a sales office or the literature center, please specify which device, revision datahseet silicon and data sheet include lit.
Register on our web site at www. This improves bandwidth over traditional von Neu. Separating program and data. A bit wide program memory access. Consequently, all instructions 35 execute in a. Function Registers, including the program counter, are. In addition, the learning curve is.
ALU and working register. The ALU is a general pur. It performs arithmetic and Boolean. The ALU is 8-bit wide and capable of addition. The other operand is a file register or an. In single operand instructions, the. Eespaol W register is an 8-bit working register used for ALU. It is not an addressable register. Depending on the instruction executed, the ALU may.
The C and DC bits.
SUBWF instructions for examples. A simplified block diagram is shown in Figureand. Two types of data memory are provided on the. These data are not lost when. The other data memory provided is. Regular RAM data memory. Data are lost when power is removed.
Our publications will be refined and enhanced as new volumes and updates are introduced. If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via E-mail at docerrors mail. Most Current Data Sheet To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at: Errata An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current devices.
The errata will specify the revision of silicon and revision of document to which it applies. Customer Notification System Register on our web site at www. This improves bandwidth over traditional von Neu- mann architecture where program and data are fetched from the same memory.
Separating program and data memory further allows instructions to be sized differ- ently than 8-bit wide data word. Instruction opcodes are bits wide making it possible to have all single word www. A bit wide program memory access bus fetches a bit instruction in a single cycle.
A two- stage pipeline overlaps fetch and execution of instruc- tions. Consequently, all instructions 35 execute in a single-cycle ns 20 MHz except for program branches. All Special Function Registers, including the program counter, are mapped in the data memory. In addition, the learning curve is reduced significantly. The ALU is a general pur- pose arithmetic unit. It performs arithmetic and Boolean functions between data in the working register and any register file.
The ALU is 8-bit wide and capable of addition, subtraction, shift and logical operations. Unless otherwise mentioned, arithmetic operations are two’s complement in nature. In two-operand instructions, typically one operand is the working register W register. The other operand is a file register or an immediate constant. In single operand instructions, the operand is either the W register or a file register.
The W register is an 8-bit working register used for ALU operations. A simplified block diagram is shown in Figureand a description of the device pins in Table Non-volatile EEPROM data memory is provided for long term stor- age of data such as calibration values, look up table data, and any other data which may require periodic updating in the field.
These data are not lost when power is removed. The other data memory provided is regular RAM data memory. Regular RAM data memory is provided for temporary storage of data during normal operation. Preliminary DSA-page 9 11 Page.