Toshiba TLCS-870/C1 Series, Manual

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TMP89FM42
RA002
Each command is outlined below. For detailed information on how each command works, refer to 22.8.1 and sub-
sequent sections.
1. Flash memory erase command
Either Chip Erase (total erase of flash memory) or Sector Erase (erase of flash memory in 4K-byte
units) can be used to erase the data in flash memory. Data in the erased area is 0xFF. If the security pro-
gram is enabled or if the option code EPFC_OP is 0xFF, the flash erase command of Sector Erase cannot
be executed.
To disable the security program setting, execute the flash erase command of Chip Erase. Before erasing
the data in flash memory, the TMP89FM42 performs password authentication except where a product is a
blank product or EPFC_OP is 0xFF. If a password is not authenticated, the flash memory erase command
is not executed.
2. Flash memory write command
Data can be written in single-byte units to a specified address in flash memory. Provision the external
controller so that it transmits data to write as binary data in the Intel Hex format. If errors do not occur
until the end record is reached, the TMP89FM42 calculates checksums in the entire flash memory area
(0x8000 through 0xFFFF), and returns the calculation results. If the security program is enabled, the flash
memory write command cannot be executed. In this case, execute Chip Erase beforehand by using the
flash memory erase command. Before executing the flash memory write command, the TMP89FM42 per-
forms password authentication except where a product is a blank product. If a password is not authenti-
cated, the flash memory write command is not executed.
3. Flash memory read command
Data can be read from a specified address in flash memory in single-byte units. Provision the external
controller so that it transmits the address in memory where a read starts, as well as the number of bytes.
After outputting the number of data equal to the number of bytes, the TMP89FM42 calculates the check-
sums of the output data, and returns the calculation results. If the security program is enabled, the flash
memory read command cannot be executed. In this case, execute Chip Erase beforehand by using the
flash memory erase command. Before executing the flash memory read command, the TMP89FM42 per-
forms password authentication except where a product is blank. If a password is not authenticated, the
flash memory read command is not executed.
Table 22-5 Operation Command in Serial PROM Mode
Command data Operation command Description
0x86 or 0x30
Setup
(matching data 1, 2)
After a reset is released, the serial PROM mode always starts operation with this
command.
If matching data 1 is 0x86, communication starts in the UART format. If matching
data 1 is 0x30, communication starts in the SIO format.
0xF0 Flash memory erase Data in the flash memory area (address 0x8000 through 0xFFFF) can be erased.
0x30 Flash memory write Data can be written to the flash memory area (address 0x8000 through 0xFFFF).
0x40 Flash memory read Data can be read from the flash memory area (address 0x8000 through 0xFFFF).
0x60 RAM loader Data can be written to a specified RAM area (address 0x0060 through 0x083F).
0x90 Flash memory SUM output
0xFF check data and 2-byte checksums of the entire flash memory area (address
0x8000 through 0xFFFF) are output in descending order (from upper to lower
bytes).
0xC0 Product ID code output Product ID codes are output.
0xC3 Flash memory status output The security program status and other status codes are output.
0xD0 Mask ROM emulation setting
Flash products of 124K or 96Kbytes can be provisioned to emulate a small-
capacity mask ROM product.
0xFA Flash memory security setting The security program setting is enabled.