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HD6433713 Datasheet(PDF) 102 Page - Renesas Technology Corp

Part # HD6433713
Description  single-chip microcontrollers
PDF  324 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6433713 Datasheet(HTML) 102 Page - Renesas Technology Corp

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4.3 Programming
The write, verify, and other modes are selected as shown in table 4-3 in PROM mode.
Table 4-3 Mode Selection in PROM Mode
Pin
Mode
CE
OE
VPP
VCC
EO7 to EO0
EA14 to EA0
Write
L
H
VPP
VCC
Data input
Address input
Verify
H
L
VPP
VCC
Data output
Address input
Programming disabled
H
H
VPP
VCC
High impedance
Address input
Notation:
L:
Low level
H:
High level
VPP:VPP level
VCC:VCC level
The specifications for writing and reading the on-chip PROM are identical to those for the
standard HN27C256H EPROM.
4.3.1 Writing and Verifying
An efficient, high-speed programming method is provided 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. H'FF data is written in unused address areas.
The basic flow of this high-speed programming method is shown in figure 4-4. Table 4-4 and
table 4-5 give the electrical characteristics in programming mode. Figure 4-5 shows a timing
diagram.
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