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113
MITSUBISHI MICROCOMPUTERS
M37902FCCHP, M37902FGCHP, M37902FJCHP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Fig. 120 Full status check flowchart and actions to be taken if an error has ocurred
Status Register Read
SR.4 = 1
and
SR.5 = 1
NO
Command Sequence
Error
YES
SR.5 = 0
YES
Block Erase
Error
NO
SR.4 = 0
YES
Programming Error
(Page, Lock bit)
NO
SR.3 = 0
YES
Programming Error
(Block)
NO
End
(Block erase, Programming)
Execute the clear status register command (50
16
) to clear the status register.
After verifying the command to be correctly input, start the operation again.
Examine whether a lock is active or not by executing the read lock bit status
command (71
16
). After removing the lock, perform block erase again. If the
same error still occurs, this page cannot be used.
Examine whether a lock is active or not by executing the read lock bit status
command (71
16
). After removing the lock, perform programming again. If the
same error still occurs, this page cannot be used.
After erasing the block where an error has occured, perform programming again.
If the same error still occurs, this block cannot be used.
Note:
Under the condition that any of SR.5, SR.4 and SR.3 =
“
1
”
, none of the page programming, block erase,
erase all unlocked block, and lock bit programming commands can be accepted. To execute these
commands, in advance, execute the clear status register command (50
16
).
AC Electrical Characteristics (V
CC
= 5 V ± 0.5 V, Ta = 0 to 60 °C, f(f
sys
) = 26 MHz (Note))
The limits of parameters other than the above are same as those in the microcomputer mode.
Note:
f(f
sys
) indicates the system clock (fsys) frequency.
Symbol
Parameter
Limits
Typ.
30
Unit
I
cc1
I
cc2
I
cc3
I
cc4
Limits of V
IH
, V
IL
, V
OH
, V
OL
, I
IH
, and I
IL
for each pin are the same as those in the microcomputer mode.
Note:
f(f
sys
) indicates the system clcok (fsys) frequency.
Min.
Max.
48
48
54
54
V
CC
power source current (at read)
V
CC
power source current (at write)
V
CC
power source current (at programming)
V
CC
power source current (at erasing)
DC Electrical Characteristics (V
CC
= 5 V ± 0.5 V, Ta = 0 to 60 °C, f(f
sys
) = 26 MHz (Note))
mA
mA
mA
mA
Parameter
Page programming time
Block erase time
Erase all unlocked block time
Lock bit programming time
n = Number of blocks to be erased
Limits
Typ.
8
50
50
n
8
Unit
Min.
Max.
120
600
600
n
120
ms
ms
ms
ms