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8XC251TA Datasheet(PDF) 5 Page - Intel Corporation |
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8XC251TA Datasheet(HTML) 5 Page - Intel Corporation |
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5 / 34 page 
ADVANCE INFORMATION 1 8xC251TA/TB/TP/TQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER 1.0 INTRODUCTION A member of the Intel family of 8-bit MCS 251 micro- controllers, the 8xC251TA/TB/TP/TQ is binary-code compatible with MCS 51 microcontrollers and pin compatible with 40-pin PDIP and 44-pin PLCC MCS 51 microcontrollers. MCS 251 microcontrollers feature an enriched instruction set, linear addressing, and efficient C-language support. The 8xC251TA/TB/TP/TQ has 512 bytes or 1 Kbyte of on-chip RAM and is available with 8 Kbytes or 16 Kbytes of on-chip ROM, or without ROM. A variety of features can be selected by new user-programmable configurations. Figure 1. 8xC251TA/TB/TP/TQ Block Diagram A4530-01 SRC2 (8) Code Address (24) Clock & Reset Code Bus (16) Data RAM 512 Bytes or 1024 Bytes Code OTPROM/ROM 8 Kbytes or 16 Kbytes Watchdog Timer Timer/ Counters PCA Two Serial I/O Ports Peripherals Port 2 Drivers P2.7:0 Port 0 Drivers P0.7:0 Port 3 Drivers P3.7:0 Port 1 Drivers P1.7:0 Memory Address (16) MCS® 251 Microcontroller Core System Bus and I/O Ports I/O Ports and Peripheral Signals SRC1 (8) Peripheral Interface Interrupt Handler Clock & Reset Bus Interface Instruction Sequencer DST (16) ALU Data Memory Interface Memory Data (16) Register File 8XC251TA/TB/TP/TQ Microcontroller |
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