
484
22.2.2
Socket Adapter Pin Correspondence and Memory Map
The on-chip PROM is programmed by using a socket adapter corresponding to the package type
as shown in table 22-3. This converts the microcomputer to a 28-pin package thus allowing the use
of a general-purpose PROM writer. Figures 22-1 to 22-5 show the socket adapter pin
correspondences.
Since the HMCS400 Series instructions are 10-bit instructions, these products include an on-chip
conversion circuit that allows a general-purpose PROM writer to be used. This circuit divides each
instruction into upper and lower 5-bit segments and allows each segment to be programmed as a
different address. Since the HD4074344 and HD4074394 have 4,096 words of PROM on chip, the
PROM writer should be set for an 8-kbyte address space ($0000 to $1FFF). Since the HD4074318
has 8,192 words of PROM on chip, the PROM writer should be set for a 16-kbyte address space
($0000 to $3FFF). And since the HD407A4359, HD407A4359R, HD407C4359R, HD4074339,
and HD407A4369 have 16,384 words of PROM on chip, the PROM writer should be set for a 32-
kbyte address space ($0000 to $7FFF).
Figures 22-6 to 22-8 show the memory maps when these microcomputers are in PROM mode.
Table 22-3 Socket Adapters
Product Number
Package
Socket Adapter Product Number
HD4074344/HD4074394
DP-28S
HS4344ESS01H
FP-28DA
HS4344ESP01H
FP-30D
HS4344ESF01H
HD4074318
DP-42S
HS4318ESS01H
FP-44A
HS4318ESH01H
HD407A4359/HD407A4359R/
DP-42S
HS4359ESS01H
HD407C4359R
FP-44A
HS4359ESH01H
HD4074339
DP-64S
HS4339ESS01H
FP-64B
HS4339ESF01H
HD407A4369
DP-64S
HS4369ESS01H
FP-64B
HS4369ESF01H