Datasheet

Section 22 PROM
Rev. 6.00 Mar. 18, 2010 Page 755 of 982
REJ09B0054-0600
Section 22 PROM
The PROM version can be set to PROM mode and programmed with a PROM programmer.
22.1 PROM Mode Setting
The PROM version (HD6472237) suspends its microcomputer functions when placed in PROM
mode, enabling the on-chip PROM to be programmed. This programming can be done with a
PROM programmer set up in the same way as for the HN27C101 (V
PP
= 12.5 V) EPROM. Use of
a socket adapter to convert from 100 pins to 32 pins enables programming with a commercial
PROM programmer.
Caution is required when selecting the PROM programmer, as this LSI does not support page
mode.
Table 22.1 shows how PROM mode is selected.
Table 22.1 Selecting PROM Mode
Pin Names Setting
MD2, MD1, MD0 Low
STBY
PA2, PA1 High
22.2 Socket Adapter and Memory Map
Programs can be written and verified by attaching a socket adapter to convert from 100 pins to 32
pins to the PROM programmer. Figure 22.1 shows the wiring of the socket adapter, and table 22.2
gives ordering information for the socket adapter. Figure 22.2 shows the memory map in PROM
mode.