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
Features
make it an even more powerful microcontroller for.
The following content is an automatically extracted verbatim text
from the original manufacturer datasheet and is provided for reference purposes only.
View original datasheet text
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 Interrupt Sources
Y Programmable Serial Channel with Framing Error Detection Automatic Address Recognition
Y TTL and CMOS Compatible Logic Levels
Y 64K External Program Memory Space
Y 64K External Data Memory Space
Y MCS 51 Microcontroller Compatible Instruction Set
Y Power Saving Idle and Power Down Mo
87C52 Datasheet
