參數(shù)資料
型號(hào): M38B79FFFP
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述: 單芯片8位CMOS微機(jī)
文件頁數(shù): 81/109頁
文件大?。?/td> 1559K
代理商: M38B79FFFP
81
38B7 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINARY
Notice: This is not a final specification.
change.
Some parametric limits are subject to
G
Read command
The microcomputer enters the read mode by inputting command
code
00
16
in the first cycle. The command code is latched into
the internal command latch at the rising edge of the WE input.
When the address of a memory location to be read is input in the
second cycle, with control signals input at the timing shown in
Figure 87, the M38B79FF outputs the contents of the specified ad-
dress from the data I/O pins to the external.
The read mode is retained until any other command is latched into
the command latch. Consequently, once the M38B79FF enters the
read mode, the user can read out the successive memory contents
simply by changing the input address and executing the second
cycle only. Any command other than the read command must be in-
put beginning from its command code over again each time the user
execute it. The contents of the command latch immediately after
power-on is 00
16
.
Fig. 87 Timings during reading
Address
Valid address
t
WC
t
CH
t
CS
t
RC
t
a(CE)
t
DF
t
WRR
t
WP
t
RRW
t
a(OE)
t
DH
t
DH
t
VSC
t
CLZ
t
OLZ
t
DS
t
a(AD)
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
PP
H
V
PP
L
CE
OE
WE
Data
V
PP
Dout
00
16
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