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參數(shù)資料
| 型號： | M38503M4H |
| 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)： | 63/86頁 |
| 文件大?。?/td> | 1193K |
| 代理商： | M38503M4H |
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63
3850 Group (Spec. H)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
Status Register 1 (SRD1)
Status register 1 indicates the status of serial communications, re-
sults from ID checks and results from check sum comparisons. It can
be read after the SRD by writing the read status register command
(70
16
). Also, status register 1 is cleared by writing the clear status
register command (50
16
).
Table 19 gives the definition of each status register bit.
“
00
16
”
is out-
put when power is turned on and the flag status is maintained even
after the reset.
Boot Update Completed Bit (SR15)
This flag indicates whether the control program was downloaded to
the RAM or not, using the download function.
Status Register (SRD)
The status register indicates operating status of the flash memory
and status such as whether an erase operation or a program ended
successfully or in error. It can be read by writing the read status reg-
ister command (70
16
). Also, the status register is cleared by writing
the clear status register command (50
16
).
Table 18 gives the definition of each status register bit. After clearing
the reset, the status register outputs
“
80
16
”
.
Sequencer status (SR7)
After power-on and recover from deep power down mode, the se-
quencer status is set to
“
1
”
(ready).
The sequencer status indicates the operating status of the device.
This status bit is set to
“
0
”
(busy) during write or erase operation and
is set to
“
1
”
upon completion of these operations.
Erase Status (SR5)
The erase status reports the operating status of the auto erase op-
eration. If an erase error occurs, it is set to
“
1
”
. When the erase sta-
tus is cleared, it is set to
“
0
”
.
Program Status (SR4)
The program status reports the operating status of the auto write
operation. If a write error occurs, it is set to
“
1
”
. When the program
status is cleared, it is set to
“
0
”
.
SRD0 bits
SR7 (bit7)
SR6 (bit6)
SR5 (bit5)
SR4 (bit4)
SR3 (bit3)
SR2 (bit2)
SR1 (bit1)
SR0 (bit0)
Definition
“
1
”
“
0
”
Ready
-
Terminated in error
Terminated in error
-
-
-
-
Table 18 Status register (SRD)
Table 19 Status register 1 (SRD1)
00
01
10
11
Time out
-
Not verified
Verification mismatch
Reserved
Verified
Normal operation
SR15 (bit7)
SR14 (bit6)
SR13 (bit5)
SR12 (bit4)
SR11 (bit3)
SR10 (bit2)
SR9 (bit1)
SR8 (bit0)
Boot update completed bit
Reserved
Reserved
Checksum match bit
ID check completed bits
Data reception time out
Reserved
“
1
”
Update completed
-
-
Match
“
0
”
Not Update
-
-
Mismatch
-
Definition
SRD1 bits
Status name
Status name
Sequencer status
Reserved
Erase status
Program status
Reserved
Reserved
Reserved
Reserved
Busy
-
Terminated normally
Terminated normally
-
-
-
-
Check Sum Consistency Bit (SR12)
This flag indicates whether the check sum matches or not when a
program is downloaded for execution using the download function.
ID Check Completed Bits (SR11 and SR10)
These flags indicate the result of ID checks. Some commands can-
not be accepted without an ID check.
Data Reception Time Out (SR9)
This flag indicates when a time out error is generated during data
reception. If this flag is attached during data reception, the received
data is discarded and the microcomputer returns to the command
wait state.
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