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參數(shù)資料
| 型號(hào)： | M38B79MFH-A055 |
| 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(yè)數(shù)： | 80/109頁(yè) |
| 文件大?。?/td> | 1559K |
| 代理商： | M38B79MFH-A055 |
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80
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
Read-only Mode
The microcomputer enters the read-only mode by applying V
PP
L
to the V
PP
pin. In this mode, the user can input the address of a
memory location to be read and the control signals at the timing
shown in Figure 86, and the M38B79FF will output the contents of
the user
’
s specified address from data I/O pin to the external. In
this mode, the user cannot perform any operation other than read.
Fig. 86 Read timing
Read/Write Mode
The microcomputer enters the read/write mode by applying V
PP
H
to the V
PP
pin. In this mode, the user must first input a software
command to choose the operation (e. g., read, program, or erase)
to be performed on the flash memory (this is called the first cycle),
and then input the information necessary for execution of the com-
mand (e.g, address and data) and control signals (this is called
the second cycle). When this is done, the M38B79FF executes the
specified operation.
Table 15 shows the software commands and the input/output in-
formation in the first and the second cycles. The input address is
latched internally at the falling edge of the WE input; software
commands and other input data are latched internally at the rising
edge of the WE input.
The following explains each software command. Refer to Figures 87
to 89 for details about the signal input/output timings.
Table 15 Software command (parallel input/output mode)
Symbol
Read
Program
Program verify
Erase
Erase verify
Reset
Device identification
Address input
×
×
×
×
Verify address
×
×
First cycle
Data input
00
16
40
16
C0
16
20
16
A0
16
FF
16
90
16
Address input
Read address
Program address
×
×
×
×
ADI
Second cycle
Data I/O
Read data (Output)
Program data (Input)
Verify data (Output)
20
16
(Input)
Verify data (Output)
FF
16
(Input)
DDI (Output)
Note:
ADI = Device identification address : manufacturer
’
s code 00000
16
, device code 00001
16
DDI = Device identification data : manufacturer
’
s code 1C
16
, device code D0
16
×
can be V
IL
or V
IH
.
Address
Valid address
t
RC
t
a(CE)
t
WRR
t
DF
t
a(OE)
t
DH
t
OLZ
Floating
Floating
t
CLZ
t
a(AD)
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
OH
V
OL
CE
OE
WE
Data
Dout
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