Zilog Z80380 User Manual
Page 108
Glossary
Glossary-6
UM004001-COR1103
OPC
Operation Code.
Op Code
Operation Code.
OTP
One-Time Programmable.
PCON
Port configuration register.
PER
Peripheral. A device which supports the import or
output of information.
POP
Retrieve a Value from the Stack.
POR
Power-On Reset.
Port
The point at which a communications circuit termi-
nates at a Network, Serial, or Parallel Interface card.
PRE
Prescaler.
PROM
Programmable Read-Only Memory.
Protocol
Formal set of communications procedures governing
the format and control between two communications
devices. A protocol determines the type of error
checking to be used, the data compression method, if
any, how the sending device indicates that it has
finished sending a message, and how the receiving
device indicates that it has received a message.
PRT
Programmable Reload Timer or Print.
PTR
Pointer.
PTT
Post, Telephone, and Telegraph. Agency in many
countries that is responsible for providing telecommu-
nication approvals.