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H838024 Datasheet(PDF) 189 Page - Renesas Technology Corp

Part # H838024
Description  Renesas 8-Bit Single-Chip Microcomputer Super Low Power Series
PDF  697 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H838024 Datasheet(HTML) 189 Page - Renesas Technology Corp

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Section 6 ROM
Rev. 7.00 Mar 10, 2005 page 147 of 652
REJ09B0042-0700
6.3
H8/38024 Programming
The write, verify, and other modes are selected as shown in table 6.2 in H8/38024 PROM mode.
Table 6.2
Mode Selection in PROM Mode (H8/38024)
Pins
Mode
CE
OE
PGM
VPP
VCC
EO7 to EO0
EA16 to EA0
Write
L
H
L
VPP
VCC
Data input
Address input
Verify
LLH
VPP
VCC
Data output
Address input
Programming
LLLVPP
VCC
High impedance
Address input
disabled
L
H
H
HL
L
HHH
[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'7FFF.
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.



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