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Chapter 8 Appendices
130
EPROM Versions
8-1 EPROM Versions
8-1-1 Overview
EPROM version is microcomputer which was replaced with the mask ROM
of the MN101C11 with an electronically programmable 16-KB EPROM.
Because the MN101CP117**(**=DP,BF,HP) is sealed in plastic, once data
is written to the internal PROM it cannot be erased.
Because the PX-AP101C11-SDC and PX-AP101C11-FBC are sealed in a
ceramic package that has a window, written data can beerased by
illumination with ultraviolet light. Plastic package uses a 42-pin shrink DIL
package, 44-pin flat package, and 48-pin flat package. Ceramic packages
uses a 42-pin shrink DIL package and 44-pin flat package.
Setting the EPROM version to EPROM mode, halts microcomputer
functions, and the internal EPROM can be programmed. Refer to the
EPROM mode pin diagram in figure 9-4-3 to 5.
The specification for writing to the internal EPROM are the same as for a
general-purpose 256Kbit EPROM(Vpp=12.5V, tpw=0.2ms). Therefore,
by replacing theEPROM Version's 42-pin socket with a special 28-pin
socket adapter(supplied by Panasonic) having the same configuration as a
normal EPROM, a general-purpose EPROM writer can be
used to perform read and write operations.
The EPROM Version is described on the following items:
- Cautions on use of the internal EPROM
- Erasing written Data in Windowed Package(PX-AP101C11-SDC, PX-
AP101C11-FBC)
- Characteristics of EPROM Versions
- Writing to the Microcomputer with Internal EPROM
- Cautions on operating a ROM writer
- Option bit
- Connections of a writing adaptor.