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Details, datasheet, quote on part number:8XC251TA
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ADVANCE INFORMATION
8xC251TA/TB/TP/TQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
C ommercial/Express
s Real-time and Programmed Wait State s User-selectable Configurations:
Bus Operation
s Binary-code Compatible with MCS® 51 s Pin Compatible with 44-pin PLCC and
40-pin PDIP MCS 51 Sockets
s Register-based MCS® 251 Architecture
-- 40-byte Register File -- Registers Accessible as Bytes, Words, or Double Words s Enriched MCS 51 Instruction Set -- 16-bit and 32-bit Arithmetic and Logic Instructions -- Compare and Conditional Jump Instructions -- Expanded Set of Move Instructions s Linear Addressing
s 256-Kbyte Expanded External
-- External Wait States (0-3 wait states) -- Address Range & Memory Mapping -- Page Mode -- Extended Data Float Timings or 8xC251Sx Compatible AC Timings s 32 Programmable I/O Lines
s Eight Maskable Interrupt Sources with
Four Programmable Priority Levels
s Three Flexible 16-bit Timer/counters s Hardware Watchdog Timer s Program mable Counter Array
Code/Data Memory Space
s ROM Options:
16 Kbytes (TB/TQ), 8 Kbytes (TA/TP), or without ROM
s 16-bit Internal Code Fetch s 64-Kbyte Extended Stack Space s On-chip Data RAM Options:
-- High-speed Output -- Compare/Capture Operation -- Pulse Width Modulator -- Watchdog Timer s Tw o Programmable Serial I/O Ports -- Framing Error Detection -- Automatic Address Recognition s High-perform ance CHMOS Technology
s Static Standby to 24-MHz Operation s Complete System Development
1-Kbyte (TA/TB) or 512-Byte (TP/TQ)
s 8-bit, 2-clock External Code Fetch in
Page Mode
s Fast MCS 251 Instruction Pipeline
Support -- Compatible with Existing Tools -- MCS 251 Tools Available: Compiler, Assembler, Debugger, ICE s Package Options (PDIP and PLCC)
© INTEL CORPORATION, 1997
November, 1997
Order Number: 273129-001
Information in this document is provided in connection with Intel products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Intel's Terms and Conditions of Sale for such products, Intel assumes no liability whatsoever, and Intel disclaims any express or implied warranty, relating to sale and/or use of Intel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Intel products are not intended for use in medical, life saving, or life sustaining applications. Intel may make changes to specifications and product descriptions at any time, without notice. Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order. Designers must not rely on the absence or characteristics of any features or instructions marked "reserved" or "undefined." Intel reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them. The 8xC251TA/TB/TP/TQ may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current characterized errata are available on request. Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be obtained from: Intel Corporation P.O. Box 5937 Denver CO 80217-9808 or call 1-800-548-4725. Many documents are available for download from Intel's website at http://www.intel.com. Copyright © Intel Corporation 1997. *Third party brands and names are the property of their respective owners.
Contents
8xC251TA/TB/TP/TQ HIGH-PERFORMANCE CHMOS Microcontroller
Commercial/Express
1.0 INTRODUCTION ........ 1 2.0 NOMENCLATURE ..... 2 3.0 PINOUT ............. 4 4.0 SIGNALS ........... 8 5.0 ADDRESS MAP ....... 11 6.0 ELECTRICAL CHARACTERISTICS ......... 12 6.1 D.C. Characteristics ......... 12 6.2 Definition of AC Symbols .......... 14 6.3 A.C. Characteristics ......... 14 6.3.1 External Bus Cycles, Nonpage Mode .... 18 6.3.2 External Bus Cycles, Page Mode .......... 21 6.3.3 Definition of Real-Time Wait Symbols ... 24 6.3.4 External Bus Cycles, Real-Time Wait States ........ 24 6.4 AC Characteristics -- Serial Port, Shift Register Mode ............ 28 6.5 External Clock Drive ........ 29 7.0 THERMAL CHARACTERISTICS ..... 30
ADVANCE INFORMATION
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Contents
FIGURES Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. TABLES Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Table 13. Table 14. Table 15. Table 16. Description of Product Nomenclature ....... 2 Proliferation Options ......... 3 Package Information ......... 3 8xC251TA/TB/TP/TQ Pin Assignment ...... 6 8xC251TA/TB/TP/TQ PLCC/DIP Pin Assignments Arranged by Functional Category ..... 7 Signal Descriptions ........... 8 Memory Signal Selections (RD1:0) ......... 10 8xC251TA/TB/TP/TQ Address Map ........ 11 DC Characteristics at VCC = 4.5 5.5 V .......... 12 AC Timing Symbol Definitions ....... 14 AC Characteristics .......... 14 Real-time Wait Timing Symbol Definitions ....... 24 Real-Time Wait AC Timing ............ 27 Serial Port Timing -- Shift Register Mode ....... 28 Exter nal Clock Drive ....... 29 Thermal Characteristics .. 30 8xC251TA/TB/TP/TQ Block Diagram ....... 1 The 8xC251TA/TB/TP/TQ Family Nomenclature..... 2 8xC251TA/TB/TP/TQ 44-pin PLCC Package .......... 4 8xC251TA/TB/TP/TQ 40-pin PDIP Packages.......... 5 Exter nal Bus Cycle: Code Fetch (Nonpage Mode) ......... 18 Exter nal Bus Cycle: Data Read (Nonpage Mode) .......... 19 Exter nal Bus Cycle: Data Write (Nonpage Mode)........... 20 Exter nal Bus Cycle: Code Fetch (Page Mode) ...... 21 Exter nal Bus Cycle: Data Read (Page Mode)........ 22 Exter nal Bus Cycle: Data Write (Page Mode)........ 23 Exter nal Bus Cycle: Code Fetch/Data Read (Nonpage Mode)...... 24 Exter nal Bus Cycle: Data Write (Nonpage Mode)........... 25 Exter nal Bus Cycle: Code Fetch/Data Read (Page Mode) ...... 26 Exter nal Bus Cycle: Data Write (Page Mode)........ 27 Serial Port Waveform -- Shift Register Mode........ 28 Exter nal Clock Drive Waveforms ............ 29 AC Testing Input, Output Waveforms ..... 29 Float Waveforms.... 30
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ADVANCE INFORMATION
8xC251TA/TB/TP/TQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
1.0
INTRODUCTION
A member of the Intel family of 8-bit MCS 251 microcontrollers, 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 configur ations.
System Bus and I/O Ports P0.7:0 P2.7:0 O Port 0 Drivers Port 2 Drivers Code TPROM/ROM 8 Kbytes 1 or 6 Kbytes
P I/O Ports and eripheral Signals P1.7:0 P3.7:0
Data RAM 512 Bytes 1 or 024 Bytes
Port 1 Drivers
Port 3 Drivers
Memory Data (16)
Memory Address (16)
Watchdog T imer
Bus Interface Code Bus (16) Code Address (24)
Peripheral I nterface CTimer/ ounters
Instruction Sequencer
Data Address (24)
IHterrupt n andler
IB Bus (8)
PCA
SRC2 (8)
Data Bus (8)
SRC1 (8)
ALU
Register F ile
MData I emory nterface
Cl&ck o R eset
S Two erial I/O Ports
Peripherals
DST (16)
MCS® 251 Microcontroller Core
Clock & Reset
8XC251TA/TB/TP/TQ Microcontroller
A4530-01
Figure 1. 8xC251TA/TB/TP/TQ Block Diagram
ADVANCE INFORMATION
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