HD6473847RHV Datasheet, PDF (169/546 Pages) Renesas Technology Corp – Renesas 8-Bit Single-Chip Microcomputer H8 Family / H8/300L Super Low Power Series

Section 6 ROM
6.3 H8/3802 Programming
The write, verify, and other modes are selected as shown in table 6.2 in H8/3802 PROM mode.
Table 6.2 Mode Selection in PROM Mode (H8/3802)
Pins
Mode
CE OE PGM Vpp Vcc EO7 to EO0
EA16 to EA0
Write
L
H
L
Vpp Vcc Data input
Address input
Verify
L
L
H
Vpp Vcc Data output
Address input
Programming L
L
L
disabled
L
H
H
Vpp Vcc High impedance Address input
H
L
L
H
H
H
Legend:
L:
Low level
H: High level
Vpp: Vpp level
Vcc: Vcc level
The specifications for writing and reading are identical to those for the standard HN27C101
EPROM. However, page programming is not supported, and so page programming mode must not
be set. A PROM programmer that only supports page programming mode cannot be used. When
selecting a PROM programmer, ensure that it supports high-speed, high-reliability byte-by-byte
programming. Also, be sure to specify addresses from H'0000 to H'3FFF.
6.3.1 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 6.4.
Rev. 7.00 Mar. 08, 2010 Page 137 of 510
REJ09B0024-0700