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HD404369F データシート(PDF) 95 Page - Renesas Technology Corp

部品番号 HD404369F
部品情報  microcomputer has an A/D converter
PDF  117 Pages
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メーカー  RENESAS [Renesas Technology Corp]
ホームページ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD404369F データシート(HTML) 95 Page - Renesas Technology Corp

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HD404369 Series
93
Programming the Built-In PROM
The MCU’s built-in PROM is programmed in PROM mode. PROM mode is set by pulling
RESET, M
0,
and
M
1 low, as shown in figure 79. In PROM mode, the MCU does not operate, but it can be programmed
in the same way as any other commercial 27256-type EPROM using a standard PROM programmer and a
100-to-28-pin socket adapter. Recommended PROM programmers and socket adapters are listed in table
29.
Since an HMCS400-series instruction is ten bits long, the HMCS400-series MCU has a built-in conversion
circuit to enable the use of a general-purpose PROM programmer. This circuit splits each instruction into
five lower bits and five upper bits that are read from or written to consecutive addresses. This means that if,
for example, 16 kwords of built-in PROM are to be programmed by a general-purpose PROM programmer,
a 32-kbyte address space ($0000–$7FFF) must be specified.
Control signals
Address bus
Data bus
VCC
GND
VPP
O7–O0
O7
O6
O5
O4–O0
CE, OE
A14–A0
O4–O0
M
0
M
1
RESET
VCC
GND
VPP
HD407A4369
PROM mode pins
Socket adapter
PROM programmer
Figure 79 PROM Mode Connections



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