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87L52


Part Number 87L52
Manufacturer Intel Corporation
Title LOW VOLTAGE CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLERS
Description VCC Supply voltage VSS Circuit ground Port 0 Port 0 is an 8-bit open drain bidirectional I O port As an output port each pin can sink several inp...
Features of the MCS-51 Family as listed below Port Pin P3 0 P3 1 P3 2 P3 3 P3 4 P3 5 P3 6 P3 7 Alternate Function RXD (serial input port) TXD (serial output port) INT0 (external interrupt 0) INT1 (external interrupt 1) T0 (Timer 0 external input) T1 (Timer 1 external input) WR (external data memory write str...

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87L54 : VCC Supply voltage VSS Circuit ground Port 0 Port 0 is an 8-bit open drain bidirectional I O port As an output port each pin can sink several inputs Port 0 pins that have 1’s written to them float and in that state can be used as high-impedance inputs Port 0 is also the multiplexed low-order address and data bus during accesses to external Program and Data Memory In this application it uses strong internal pullups when emitting 1’s and can source and sink several inputs Port 0 also receives the code bytes during OTP ROM programming and outputs the code bytes during program verification External pullup resistors are required during program verification Port 1 Port 1 is an 8-bit bidirectional.

87L58 : VCC Supply voltage VSS Circuit ground Port 0 Port 0 is an 8-bit open drain bidirectional I O port As an output port each pin can sink several inputs Port 0 pins that have 1’s written to them float and in that state can be used as high-impedance inputs Port 0 is also the multiplexed low-order address and data bus during accesses to external Program and Data Memory In this application it uses strong internal pullups when emitting 1’s and can source and sink several inputs Port 0 also receives the code bytes during OTP ROM programming and outputs the code bytes during program verification External pullup resistors are required during program verification Port 1 Port 1 is an 8-bit bidirectional.




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