Programming Methods - Intel 8XC196NT User Manual

PROGRAMMING THE NONVOLATILE MEMORY
The 87C196NT contains 32 Kbytes of one-time-programmable read-only memory (OTPROM).
OTPROM is similar to EPROM, but it comes in an unwindowed package and cannot be erased.
You can either program the OTPROM yourself or have the factory program it as a quick-turn
ROM product (this option may not be available for all devices). This chapter provides procedures
and guidelines to help you program the device. The information is organized as follows.
•
overview of programming methods (page 15-2)
•
OTPROM memory map (page 15-2)
•
security features (page 15-3)
•
programming pulse width (page 15-8)
•
modified quick-pulse algorithm (page 15-9)
•
programming mode pins (page 15-11)
•
entering programming modes (page 15-13)
•
slave programming (page 15-15)
•
auto programming (page 15-25)
•
serial port programming (page 15-31)
•
run-time programming (page 15-43)

15.1 PROGRAMMING METHODS

You can program the OTPROM by configuring a circuit that allows the device to enter a program-
ming mode. In programming modes, the device executes an algorithm that resides in the internal
test ROM.
•
Slave programming mode allows you to use an EPROM programmer as a master to
program 8XC196 devices (the slaves). The code and data to be programmed into the
nonvolatile memory typically resides on a diskette. The EPROM programmer transfers the
code and data from the diskette to its memory, then manipulates the slave's pins to define
the addresses to be programmed and the contents to be written to those addresses. Using this
CHAPTER 15
15-1