IBM MaxLoader Network Card User Manual


 
MaxLoader User’s Guide
23
16-bit 1-Megabits
Any devices with the number 27210, 271024 and the MITSUBISHI 27102.
27011: The 27011 is a 28-pin 1-megabit device that is organized into 8 pages of
16k-bytes. NOTE: The 27512 is 4 pages of 16k-bytes.
Erasing an EPROM
An EPROM has a quartz window located on the chip just above the die. Erasing
an EPROM is done by exposing the EPROM to high-frequency ultra-violet
(UV) light waves. Erasing an EPROM usually takes 15-20 minutes, but may be
shorter or longer, depending on the device. If you wish to purchase an Eraser,
call EE Tools at (408) 263-2221. When an EPROM is not being erased, the
window may be covered with an opaque label. Sometimes (over a period of
years) an EPROM will start to erase due to the rooms level of fluorescent light.
Direct exposure to sunlight also has the same effect, but happens much more
rapidly
.
PLD
A programmable logic device (PLD) consists of an array of logic gates and flip-
flops that can be programmed to implement an almost unlimited number of
logic designs. These are programmable logic arrays that can be EEPROM based,
EPROM based, fused link, anti-fuse, or Flash-based technology. They are
programmable by the user to implement logic circuits in order to reduce part