M37905F8CFP Datasheet, PDF (24/35 Pages) Mitsubishi Electric Semiconductor – 16-BIT CMOS MICROCOMPUTER

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MITSUBISHI MICROCOMPUTERS
M37905F8CFP, M37905F8CSP
16-BIT CMOS MICROCOMPUTER
Status Register Read
SR.4 = 1
and
SR.5 = 1
?
NO
SR.5 = 0?
YES
NO
Command Sequence
Error
Block Erase Error
YES
NO
SR.4 = 0?
Programming Error
YES
End
(Block erase, Programming)
➀ Execute the clear status register command (5016) to clear the status register.
➁ Confirm whether the command has correctly been input or not; and then,
start the operation again.
Perform the block erase operation again.
If an error occurs even after the above operation is performed, the block cannot be used.
Perform the programming operation again.
If an error occurs even after the above operation is performed, the word cannot be used.
Note: Under the condition that any of SR.5 and SR.4 = 1 , none of the programming,
block erase, and erase all block commands can be accepted. Before execution
of these commands, execute the clear status register command (5016) in advance.
Fig. 11 Full status check flowchart and actions to be taken if an error has ocurred
DC Electrical Characteristics (VCC = 5 V ± 0.5 V, Ta = 0 to 60 °C, f(fsys) = 20 MHz (Note))
Symbol
Parameter
Limits
Min. Typ. Max.
Unit
Icc1
VCC power source current (at read)
Icc2
VCC power source current (at write)
Icc3
VCC power source current (at programming)
Icc4
VCC power source current (at erasing)
30
48
mA
48
mA
54
mA
54
mA
Limits of VIH, VIL, VOH, VOL, IIH, and IIL for each pin are the same as those in the microcomputer mode.
Note: f(fsys) indicates the system clcok (fsys) frequency.
AC Electrical Characteristics (VCC = 5 V ± 0.5 V, Ta = 0 to 60 °C, f(fsys) = 20 MHz (Note))
Parameter
256-byte programming time
Block erase time
Erase all block time
Limits
Min. Typ. Max.
Unit
4
40
ms
0.6
8
s
0.6 ✕ n 8 ✕ n
s
n = Number of blocks to be erased
The limits of parameters other than the above are same as those in the microcomputer mode.
Note: f(fsys) indicates the system clock (fsys) frequency.
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