參數(shù)資料
型號： M38000S8-XXXHP
廠商： Mitsubishi Electric Corporation
英文描述： 16 Characters x 2 Lines, 5x7 Dot Matrix Character and Cursor
中文描述： 8位單片機
文件頁數(shù)： 101/173頁
文件大?。?/td> 4203K
代理商： M38000S8-XXXHP
APPLICATION
2.4 Processor mode
2-53
3800 GROUP USER’S MANUAL
(2) Application example of memory expansion in the case where the
ONW
(One-Wait)
function is used
Outline
:
ONW
function is used when the external memory access is slow.
If “L” level signal is input to the P3
2
/
ONW
pin while the CPU is in the read or write status,
the read or write cycle corresponding to 1 cycle of
φ
is extended. In the extended period,
the
RD
or
WR
signal is kept at the “L” level. The
ONW
function operates only when data is
read from or written into addresses 0000
16
to 0007
16
and addresses 0440
16
to FFFF
16
.
Figure 2.4.7 shows an application example of the
ONW
function.
Fig. 2.4.7 Application example of the
ONW
function
3800 group
CNV
SS
AD
15
8
P5
8
P6
ONW
AD
14
AD
0
DB
0
DB
7
RD
WR
M5M27C256AK-10
M5M5256BP-10
CE
A
0
–A
14
D
0
–D
7
OE
A
0
–A
14
DQ
1
–DQ
8
OE
W
8MHz
V
CC
= 5.0V ± 10 %
External RAM area
(M5M5256BP)
SFR area
Internal RAM area
External RAM area
(M5M5256BP)
External ROM area
(M5M27C256AK)
0000
16
8000
16
0440
16
0040
16
0008
16
FFFF
16
Memory map
74F04
S
–
15
8
8
P4
2
P3
0
, P3
1
EPROM
SRAM
–
2
P7
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相關代理商/技術參數(shù)
參數(shù)描述
M38000S8-XXXSP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER
M38000S8-XXXSS 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER
M38000T2-CPE 功能描述:EMULATOR BASE UNIT 740 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 內(nèi)電路編程器、仿真器以及調(diào)試器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 19/Jul/2010 標準包裝:1 系列:* 類型:* 適用于相關產(chǎn)品:* 所含物品:*
M38001E1-DXXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
M38001E1-DXXXSP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
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