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8XC251TA Datasheet(PDF) 5 Page - Intel Corporation

Part No. 8XC251TA
Description  HIGH-PERFORMANCE CHMOS MICROCONTROLLER
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Maker  INTEL [Intel Corporation]
Homepage  http://www.intel.com
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8XC251TA Datasheet(HTML) 5 Page - Intel Corporation

 
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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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