LD83C51FC-2 데이터 시트보기 (PDF) - Intel

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LD83C51FC-2

CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLERS

Intel 

8XC51FX

ONCE MODE

The ONCE (``On-CircuitEmulation'') Mode facilitates

testing and debugging of systems using the

8XC51FX without the 8XC51FX having to be re-

moved from the circuit. The ONCE Mode is invoked

by:

1) Pull ALE low while the device is in reset and

PSEN is high;

2) Hold ALE low as RST is deactivated.

While the device is in ONCE Mode, the Port 0 pins

float, and the other port pins and ALE and PSEN are

weakly pulled high. The oscillator circuit remains ac-

tive. While the 8XC51FX is in this mode, an emulator

or test CPU can be used to drive the circuit. Normal

operation is restored when a normal reset is applied.

8XC51FX EXPRESS

The Intel EXPRESS system offers enhancements to

the operational specifications of the MCS-51 family

of microcontrollers. These EXPRESS products are

designed to meet the needs of those applications

whose operating requirements exceed commercial

standards.

The EXPRESS program includes the commercial

standard temperature range with burn-in and an ex-

tended temperature range with or without burn-in.

With the commercial standard temperature range,

operational characteristics are guaranteed over the

temperature range of 0°C to 70 °C. With the extend-

ed temperature range option, operational character-

istics are guaranteed over the range of b 40°C to

a 85°C.

The optional burn-in is dynamic for a minimum time

of 168 hours at 125°C with VCC =6.9V g 0.25V,

following guidelines in MlL-STD-883, Method 1015.

For the extended temperature range option, this

data sheet specifies the parameters which deviate

from their commercial temperature range limits.

NOTE:

Intel offers Express Temperature specifica-

tions for all 8XC51FX speed options except

for 33 MHz.

Table 3. Package Identification

Package Type

Temperature Range

Cerdip

Commercial

PLCC

Commercial

Plastic

Commercial

QFP

Commercial

Cerdip

Extended

PLCC

Extended

Plastic

Extended

QFP

Extended

Cerdip

Extended

PLCC

Extended

Plastic

Extended

QFP

Extended

Burn-In

No

No

No

No

Yes

Yes

Yes

Yes

No

No

No

No

7

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