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8XC51R Folha de dados(PDF) 7 Page - Intel Corporation |
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8XC51R Folha de dados(HTML) 7 Page - Intel Corporation |
7 / 20 page 8XC51RARBRC ONCE MODE The ONCE (‘‘On-Circuit Emulation’’) Mode facilitates testing and debugging of systems using the 8XC51RX without the 8XC51RX 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 8XC51RX 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 8XC51RX 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 Cto a70 C With the ex- tended temperature range option operational char- acteristics are guaranteed over the range of b40 C to a85 C The optional burn-in is dynamic for a minimum time of 168 hours at 125 C with VCC e 69V g025V following guidelines in MIL-STD-883 Method 1015 Package types and EXPRESS versions are identified by a one- or two-letter prefix to the part number The prefixes are listed in Table 3 For the extended temperature range option this data sheet specifies the parameters which deviate from their commercial temperature range limits Table 3 Prefix Identification Prefix Package Temperature Burn-In Type Range P Plastic Commercial No N PLCC Commercial No S QFP Commercial No TP Plastic Extended No TN PLCC Extended No TS QFP Extended No LP Plastic Extended Yes LN PLCC Extended Yes LS QFP Extended Yes NOTE Contact distributor or local sales office to match EXPRESS prefix with proper device EXAMPLES P80C51RA indicates 80C51RA in a plastic package and specified for commercial temperature range without burn-in TS87C51RC indicates 87C51RC in a QFP package and specified for extended temperature range without burn-in 7 |
Nº de peça semelhante - 8XC51R |
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Descrição semelhante - 8XC51R |
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