HD404344R Datasheet, PDF (83/102 Pages) Renesas Technology Corp – 4-bit microcomputer has an A/D converter

HD404344R Series/HD404394 Series
Table 23 PROM Programmer and Socket Adapter
PROM Programmer
Maker
DATA I/O
AVAL Corp.
Type Name
UNISITE
PKW-3100
Socket Adapter
Package
DP-28S
FP-28DA
FP-30D
Maker
Hitachi
Type Name
HS4344ESS01H
HS4344ESP01H
HS4344ESF01H
Programming and Verification
The HD4074344 and HD4074394 can be high-speed programmed without causing voltage stress or
affecting data reliability.
Table 24 shows how programming and verification modes are selected.
Table 24 PROM Mode Selection
Mode
Programming
Verification
Programming inhibited
Pin
CE
OE
V_PP
Low
High
V_PP
High
Low
V_PP
High
High
V_PP
O₀–O₄
Data input
Data output
High impedance
Precautions
1. Addresses $0000 to $1FFF should be specified if the PROM is programmed by a PROM programmer.
If address $2000 or higher is accessed, the PROM may not be programmed or verified correctly. Note
that the plastic package type devices cannot be erased and reprogrammed. Set all data in unused
addresses to $FF.
2. Be careful of not using the wrong PROM programmer or socket adapter, which may cause an
overvoltage and damage the LSI. Make sure that the LSI is firmly fixed onto the socket adapter, and
that the socket adapter is firmly fixed to the programmer.
3. The PROM should be programmed with V_PP = 12.5 V. Other PROMs use 21 V. If 21 V is applied to
the HD4074344 or HD4074394, the LSI may become permanently damaged. 12.5 V is Intel’s 27256
V_PP.
81