參數(shù)資料
型號(hào)： M38020E6
廠商： Mitsubishi Electric Corporation
英文描述： Single Output LDO, 800mA, Fixed(2.5V), Internal Current limit, Thermal Overload Protection 4-SOT-223 0 to 125
中文描述： 單芯片8位CMOS微機(jī)
文件頁(yè)數(shù)： 26/51頁(yè)
文件大?。?/td> 692K
代理商： M38020E6
MITSUBISHI MICROCOMPUTERS
3802 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
32
Bus control with memory expansion
The 3802 group has a built-in ONW function to facilitate access to
external memory and I/O devices in memory expansion mode or
microprocessor mode.
If an “L” level signal is input to the ONW pin when the CPU is in a
read or write state, the corresponding read or write cycle is ex-
tended by one cycle of
φ. During this extended period, the RD or
WR signal remains at “L”. This extension period is valid only for
writing to and reading from addresses 0000 16 to 000716 and
044016 to FFFF16 in microprocessor mode, 044016 to YYYY16 in
memory expansion mode, and only read and write cycles are ex-
tended.
Fig. 34 ONW function timing
φ
Read cycle
Write cycle
Dummy cycle Write cycle
Read cycle Dummy cycle
AD15 to AD0
Period during which ONW input signal is received
During this period, the ONW signal must be fixed at either “H” or “L”. At all other times, the input level of the ONW
signal has no affect on operations.
The bus cycles is not extended for an address in the area 000816 to 043F16, regardless of whether the ONW signal
is received.
V :
V
VV
ONW
WR
RD
相關(guān)PDF資料
PDF描述
M38020E7 Single Output LDO, 800mA, Fixed(2.5V), Internal Current limit, Thermal Overload Protection 4-SOT-223 0 to 125
M38020E8 Single Output LDO, 800mA, Fixed(2.5V), Internal Current limit, Thermal Overload Protection 8-SON 0 to 125
M38020M1 Single Output LDO, 800mA, Fixed(2.5V), Internal Current limit, Thermal Overload Protection 8-SON 0 to 125
M38020M2 Single Output LDO, 800mA, Fixed(2.5V), Internal Current limit, Thermal Overload Protection 4-SOT-223 -40 to 125
M38020M3 Single Output LDO, 800mA, Fixed(3.3), Internal Current limit, Thermal Overload Protection 4-SOT-223 0 to 125
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