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22.
Flash Memory Operation
22.2
Detail of Flash Memory
22.2.5.3
(1)
(2)
22.2.5.4
(1)
(2)
22.2.5.5
(1)
(2)
2019-02-06
Automatic Block Erase
Operation Description
The automatic erase command performs erase operation to the specified block. If the specified
block is protected, erase operation is not executed.
How to Set
The 1st to 5th bus write cycles indicate the automatic block erase command. In the 6th bus write cy-
cle, the block to be erased is specified. After the command sequence is input, the automatic block
erase operation starts.
No automatic verify operation is performed internally in the device. So, be sure to read the data
to confirm that it has been correctly erased.
Automatic Protect Bit Program
Operation Description
The automatic protect bit program writes "1" to a protect bit at a time. To set "0" to a protect bit,
use the automatic protect bit erase command.
For detail of the protect function, refer to "22.1.5 Protect/Security Function".
How to Set
The 1st to 6th bus write cycles indicate the automatic protect bit program command. In the 7th
bus write cycle, the protect bit to be written is specified. After the command sequence is input, the au-
tomatic protect bit program starts. Check whether write operation is normally terminated with
FCPSRA<BLK3> to <BLK0>.
Auto Protect Bit Erase
Operation Description
The automatic protect bit erase command operation depends on the security status. For detail of se-
curity status, refer to "22.1.5 Protect/Security Function".
・ Non-security status
Clear the specified protect bit to "0". Protect bit erase is performed in 4-bit unit.
・ Security status
Erase all protect bits after all addresses of Flash memory are erased.
How to Set
The 1st to 6th bus write cycles indicate the automatic protect bit erase command. In the 7th bus
write cycle, the protect bit to be erased is specified. After the command sequence is input, the automat-
ic protect bit erase operation starts.
In the non-security status, specified protect bit is erased. Check whether erase operation is normal-
ly terminated with FCPSRA<BLK3> to <BLK0>.
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TMPM3V6/M3V4
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