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H8S/2240 数据表(PDF) 578 Page - Renesas Technology Corp

部件名 H8S/2240
功能描述  Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
PDF  818 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

H8S/2240 数据表(HTML) 578 Page - Renesas Technology Corp

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Section 16 ROM
Rev.3.00 Mar. 26, 2007 Page 536 of 772
REJ09B0355-0300
16.5
Programming
16.5.1
Overview
Table 16.5 shows how to select the program, verify, and program-inhibit modes in PROM mode.
Table 16.5
Mode Selection in PROM Mode
Pins
Mode
CE
CE
CE
CE
OE
OE
OE
OE
PGM
PGM
PGM
PGM V
PP
V
CC
EO
7 to EO0
EA
16 to EA0
Program
L
H
L
V
PP
V
CC
Data input
Address input
Verify
LLH
V
PP
V
CC
Data output
Address input
Program-inhibit
LLLV
PP
V
CC
High impedance
Address input
LH
H
HL
L
HHH
Legend:
L:
Low voltage level
H:
High voltage level
V
PP: VPP voltage level
V
CC: VCC voltage level
Programming and verification should be carried out using the same specifications as for the
standard HN27C101 EPROM.
However, do not set the PROM programmer to page mode does not support page programming. A
PROM programmer that only supports page programming cannot be used. When choosing a
PROM programmer, check that it supports high-speed programming in byte units. Always set
addresses within the range H'00000 to H'1FFFF.
16.5.2
Programming and Verification
An efficient, high-speed programming procedure can be used to program and verify PROM data.
This procedure writes data quickly without subjecting the chip to voltage stress or sacrificing data
reliability. It leaves the data H'FF in unused addresses. Figure 16.4 shows the basic high-speed
programming flowchart. Tables 16.6 and 16.7 list the electrical characteristics of the chip during
programming. Figure 16.5 shows a timing chart.



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