HD6433832S Datasheet, PDF (136/560 Pages) Renesas Technology Corp – single-chip microcomputers

6.5 H8/3837 Programming
The write, verify, and other modes are selected as shown in table 6.8 in H8/3837 PROM mode.
Table 6.8 Mode Selection in H8/3837 PROM Mode
Mode
CE OE PGM V_PP
Write
L
H
L
V_PP
Verify
L
L
H
V_PP
Programming L
L
L
V_PP
disabled
L
H
H
H
L
L
H
H
H
Notation:
L: Low level
H: High level
V_PP: V_PP level
V_CC: V_CC level
Pin
V_CC
EO₇ to EO₀
V_CC
Data input
V_CC
Data output
V_CC
High impedance
EA₁₆ to EA₀
Address input
Address input
Address input
The specifications for writing and reading the on-chip PROM are identical to those for the
standard HN27C101 EPROM. Page programming is not supported, however. The PROM writer
must not be set to page mode. A PROM programmer that provides only page programming mode
cannot be used. When selecting a PROM programer, check that it supports a byte-by-byte high-
speed, high-reliability programming method. Be sure to set the address range to H'0000 to
H'EDFF.
6.5.1 Writing and Verifying
An efficient, high-speed, high-reliability method is available for writing and verifying the PROM
data. This method achieves high speed without voltage stress on the device and without lowering
the reliability of written data. The basic flow of this high-speed, high-reliability programming
method is shown in figure 6.8.
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