參數(shù)資料
型號: HD404368
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer(4位單片微計算機)
中文描述: 4位HMCS400系列微機(4位單片微計算機)
文件頁數(shù): 93/115頁
文件大?。?/td> 710K
代理商: HD404368
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
V
CC
GND
V
PP
O
7
–O
0
O
7
O
6
O
5
O
4
–O
0
CE
,
OE
A
14
–A
0
O
4
–O
0
M
0
M
1
RESET
V
GND
V
PP
HD407A4369
PROM mode pins
Socket adapter
PROM programmer
Figure 79 PROM Mode Connections
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HD40A4368 4-bit HMCS400-Series microcomputer(4位單片微計算機)
HD40A4369 4-bit HMCS400-Series microcomputer(4位單片微計算機)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD404368F 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit HMCS400-Series microcomputer
HD404368H 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer has an A/D converter
HD404368S 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit HMCS400-Series microcomputer
HD404369 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer has an A/D converter
HD404369F 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit HMCS400-Series microcomputer