87C54, 87C52 Datasheet - Intel

87C54 CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

VCC Supply voltage VSS Circuit ground VSS1 Secondary ground (not on DIP) Provided to reduce ground bounce and improve power supply by-passing NOTE This pin is not a substitute for the VSS pin (pin 22) (Connection not necessary for proper operation ) Port 0 Port 0 is an 8-bit open drain bidirectiona.

8XC52 54 58 CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER Commercial Express 87C52 80C52 80C32 87C54 80C54 87C58 80C58 See Table 1 for Proliferation Options Y High Performance CHMOS EPROM ROM CPU Y 12 24 33 MHz Operations Y Three 16-Bit Timer Counters Y Programmable Clock Out Y Up Down Timer Counter Y Three Level Program Lock System Y 8K 16K 32K On-Chip Program Memory Y 256 Bytes of On-Chip Data RAM Y Improved Quick Pulse Programming Algorithm Y Boolean Processor Y 32 Programmable I O Lines Y 6 Inte.

87C54 Features

* make it an even more powerful microcontroller for applications that require clock output and up down counting capabilities such as motor control It also has a more versatile serial channel that facilitates multi-processor communications Throughout this document 8XC5X will refer to the 8XC52 80C32 8

87C52-Intel.pdf