參數(shù)資料
型號: M38002E2SP
廠商: Mitsubishi Electric Corporation
元件分類: DC/DC變換器
英文描述: 1 watt dc-dc converters
中文描述: 1瓦的DC - DC轉換器
文件頁數(shù): 4/173頁
文件大小: 4203K
代理商: M38002E2SP
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 P32/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 000016 to 000716 and addresses 044016 to FFFF16.
Figure 2.4.7 shows an application example of the ONW function.
____
Fig. 2.4.7 Application example of the ONW function
3800 group
CNVSS
AD15
8
P5
8
P6
ONW
AD14
AD0
DB0
DB7
RD
WR
M5M27C256AK-10
M5M5256BP-10
CE
A0–A14
D0–D7
OE
A0–A14
DQ1–DQ8
OE
W
8MHz
VCC= 5.0V ± 10 %
External RAM area
(M5M5256BP)
SFR area
Internal RAM area
External RAM area
(M5M5256BP)
External ROM area
(M5M27C256AK)
000016
800016
044016
004016
000816
FFFF16
Memory map
74F04
S
15
8
P4
2
P30, P31
EPROM
SRAM
2
P7
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相關代理商/技術參數(shù)
參數(shù)描述
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M38002E2-XXXSS 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER