Hardware manual

Rev. 3.0, 09/98, page 253 of 361
14.2.2 Socket Adapter Pin Assignments and Memory Map
The H8/338 and H8/337 can be programmed with a general-purpose PROM writer by using a
socket adapter to change the pin-out to 32 pins. There are different socket adapters for different
packages as listed in table 14.3. The same socket adapters can be used for both the H8/338 and
H8/337. Figure 14.2 shows the socket adapter pin assignments.
Table 14.3 Socket Adapters
Package Socket Adapter
84-pin PLCC HS338ESC02H
84-pin windowed LCC HS338ESG02H
80-pin QFP HS338ESH02H
The PROM size is 48k bytes for the H8/338 and 32k bytes for the H8/337. Figures 14.3 and 14.4
show memory maps of the H8/338 and H8/337 in PROM mode. H'FF data should be specified for
unused address areas in the on-chip PROM.
When programming with a PROM writer, limit the program address range to H'0000 to H'BFFF
for the H8/338 and H'0000 to H'7FFF for the H8/337. Specify H'FF data for addresses H'C000
and above (H8/338) or H'8000 and above (H8/337). If these addresses are programmed by
mistake, it may become impossible to program or verify the PROM data. The same problem may
occur if an attempt is made to program the chip in page programming mode. Particular care is
required with a plastic package, since the programmed data cannot be erased.