tmp89fh42l TOSHIBA Semiconductor CORPORATION, tmp89fh42l Datasheet - Page 344
tmp89fh42l
Manufacturer Part Number
tmp89fh42l
Description
8 Bit Microcontroller Tlcs-870/c1 Series
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP89FH42L.pdf
(428 pages)
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21.4
Toggle Bit (D6)
RA006
21.4
21.3.5
21.3.6
of the 6th bit (D6) in data read by a read operation is reversed each time a read is performed. This bit reversal can be
used as a software mechanism for checking the completion of each operation. Normally, perform read operations twice
on the same address in the flash memory, and perform polling until the same data is read from the flash memory.
bit read by the first read operation is always "1".
Note 1: If FLSCR1<FLSMD> is set to "disable", the toggle bit is not reversed.
Note 2: Do not read the toggle bit by using a 16-bit transfer instruction. If the toggle bit is read using a 16-bit transfer
Note 3: Because the instruction cycle is longer than the write time in SLOW mode, the value is not reversed, even if the
After the flash memory write, the chip erase, and the security program command sequence are executed, the value
After the flash memory write, the chip erase, and the security program command sequence are executed, the toggle
Toggle Bit (D6)
the flash memory overwrite command and the RAM loader command cannot be executed in serial PROM mode.
enabled or disabled, read 0xFF7F in product ID mode. Refer to Table 21-4 for further details. The time needed
to enable or disable the security program is 40 μs maximum. The next command sequence cannot be executed
until the security program setting is completed. To check the completion of the security program setting, perform
read operations twice on the same address in the flash memory, and perform polling until the same data is read.
When the security program setting is being made, bit 6 is reversed each time a read is performed.
This command is used to exit the Product ID mode.
If the security program is enabled, the flash memory is write and read protected in parallel PROM mode, and
To disable the security program, the chip erase must be performed. To check whether the security program is
Product ID exit
Security program
instruction, the toggle bit does not function properly.
toggle bit is read right after the Byte Program is performed.
Table 21-4 Values to Be Read in Product ID Mode
Address
0xFF7F
0xF000
0xF001
Vendor ID
Flash ID
Security status
Meaning
Page 330
0x98
0x4D
0xFF:
Other than 0xFF: Security program enabled
Security program disabled
Read value
TMP89FH42L
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