N80C251TB24 Intel, N80C251TB24 Datasheet - Page 7

• Manufacturer Part Number: N80C251TB24
• Description: IC MPU 8-BIT 5V 24MHZ 44-PLCC
• Manufacturer: Intel
• Series: 80Cr

Specifications of N80C251TB24

• Rohs Status: RoHS non-compliant
• Core Processor: MCS 251
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: SIO
• Peripherals: PWM, WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Other names: 816721

1.0
A member of the Intel family of 8-bit MCS 251 micro-
controllers,
compatible with MCS 51 microcontrollers and pin
compatible with 40-pin PDIP and 44-pin PLCC
MCS 51 microcontrollers. MCS 251 microcontrollers
INTRODUCTION
System Bus and I/O Ports
the
SRC2 (8)
SRC1 (8)
Code Bus (16)
Drivers
P0.7:0
Port 0
ALU
DST (16)
8xC251TB/TQ
Instruction Sequencer
Drivers
Memory Data (16)
P2.7:0
Memory Address (16)
Port 2
Bus Interface
Register
File
Figure 1. 8xC251TB/TQ Block Diagram
MCS
is
Code Address (24)
OTPROM/ROM
8xC251TB/TQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
16 Kbytes
8 Kbytes
®
Interface
Memory
binary-code
Code
Data
251 Microcontroller Core
or
feature
addressing, and efficient C-language support. The
8xC251TB/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 configu-
rations.
Peripheral
1024 Bytes
Interface
Interrupt
Data RAM
an
512 Bytes
Handler
Clock
Reset
or
&
enriched
Clock & Reset
Drivers
P1.7:0
Port 1
Peripheral Signals
instruction
I/O Ports and
Peripherals
Watchdog
Serial I/O
Counters
Timer/
Timer
PCA
Ports
Drivers
P3.7:0
Two
Port 3
set,
B2976-01
linear
1