8XC51GB-1 datasheet(3/22 Pages) INTEL

номер детали	8XC51GB-1

подробное описание детали	CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

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производитель	INTEL [Intel Corporation]

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8XC51GB

PARALLEL IO PORTS

The 8XC51GB contains six 8-bit parallel IO ports

All six ports are bidirectional and consist of a latch

an output driver and an input buffer Many of the

port pins have multiplexed IO and control functions

Port Pins as Outputs

Port 0 has open drain outputs when it is not serving

as the external data bus The internal pullup is active

only when the pin is outputting a logic 1 during exter-

nal memory access An external pullup resistor is

required on Port 0 when it is serving as an output

port

Ports 1 2 3 4 and 5 have quasi-bidirectional out-

puts A strong pullup provides a fast rise time when

the pin is set to a logic 1 This pullup turns on for two

oscillator periods to drive the pin high and then turns

off The pin is held high by a weak pullup

Writing the P0 P1 P2 P3 P4 or P5 Special Function

Register sets the corresponding port pins All six

port registers are bit addressable

Port Pins as Inputs

The pins of all six ports are configured as inputs by

writing a logic 1 to them Since Port 0 is an open

drain port it provides a very high input impedance

Since pins of Port 1 2 3 4 and 5 have weak pullups

(which are always on) they source a small current

when driven low externally All ports except Port 0

have Schmitt trigger inputs

Port States During Reset

Ports 0 and 3 reset asynchronously to a one and

Ports 1 2 4 and 5 reset to a zero asynchronously

PIN DESCRIPTIONS

The 8XC51GB will be packaged in the 68-lead PLCC

package Its pin assignment is shown in Figure 2

VCC Supply Voltage

VSS Circuit Ground

Diagram is for Pin Reference Only Package Size is Not to Scale

272337 – 2

OTP only

Figure 2 Pin Connections

3

Аналогичный номер детали - 8XC51GB-1

производитель	номер детали	датащи	подробное описание детали
NXP Semiconductors	8XC51	238Kb / 32P	80C51 8-bit microcontroller family 128/256 byte RAM ROMless low voltage (2.7 V–5.5 V), low power, high speed (33 MHz) 2000 Aug 07
	8XC51FA	355Kb / 56P	80C51 8-bit microcontroller family 8K-4K/256-1K OTP/ROM/ROMless, low voltage (2.7V-5.5V), low power, high speed (33 MHz) 2000 Aug 07
	8XC51FA	348Kb / 55P	8-bit CMOS (low voltage, low power and high speed) microcontroller families 1999 Apr 01
	8XC51FB	233Kb / 58P	Low power single card reader 2003 Oct 30
	8XC51FB	355Kb / 56P	80C51 8-bit microcontroller family 8K-4K/256-1K OTP/ROM/ROMless, low voltage (2.7V-5.5V), low power, high speed (33 MHz) 2000 Aug 07

More results

Аналогичное описание - 8XC51GB-1

производитель	номер детали	датащи	подробное описание детали
Intel Corporation	80C31BH	229Kb / 16P	CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
	8XC52	317Kb / 23P	CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
	80C52	312Kb / 23P	CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
	87C51FA	279Kb / 18P	CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
	8XC51R	294Kb / 20P	CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
	TD87C54	312Kb / 23P	CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
	EN80C321SF88	1Mb / 23P	CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
	M80C51FB	184Kb / 12P	CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
	EE87C51FB1SF76	256Kb / 18P	CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
	87C51FA	279Kb / 18P	CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

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