TMP89FS60 datasheet(328/410 Pages) TOSHIBA

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21. Flash Memory

TMP89FS60

RA003

21.3 Command Sequence

In MCU and serial PROM modes, the command sequence consists of six commands (JEDEC compatible), as

shown in Table 21-1.

Note 1: Specify the address and data to be written (Refer to Table 21-2 about BA).

Note 2: The area to be erased is specified with the upper 4 bits of the address (Refer to Table 21-3 about SA).

Note 3: Do not start the STOP, IDLE0, IDLE1, IDLE2, SLEEP1 or SLEEP0 mode while a command sequence is being executed or

a task specified in a command sequence is being executed (write, erase or ID entry).

Note 4: # ; 0x1 through 0xF should be specified as the upper 4bits of the address. However, while FLSCRM<BAREAM> is "1", 0x2

or more should be specified. Usually, it is recommended that 0xF is specified.

Note 5: XXX ; Don’t care

21.3.1 Byte program

This command writes the flash memory in units of one byte. The address and data to be written are specified

in the 4th bus write cycle. The range of addresses that can be specified is shown in Table 21-2. For example, to

write data to 0x1000 in the data area, set FLSCR1<FAREA> to "0y01", set "0xD5" on FLSCR2<CR1EN>, and

then specify 0x9000 as an address in the 4th bus write cycle. The time needed to write each byte is 40

µs max-

imum. The next command sequence cannot be executed if an ongoing write operation is not completed. To

check the completion of the write operation, 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. During the write operation, bit

6 is reversed each time a read is performed.

Note 1: To rewrite data to addresses in the flash memory where data (including 0xFF) is already written, make sure

that you erase the existing data by performing a sector erase or chip erase before writing data.

Note 2: The data and code areas become mirror areas. As you access these areas, you are brought to the same

physical address in memory. When performing a Byte Program, make sure that you write data to either of

these two areas, not both.

Note 3: Do not perform a Byte Program on areas other than those shown in Table 21-2.

Table 21-1 Command Sequence

Command sequence

1st Bus Write

Cycle

2nd Bus Write

Cycle

3rd Bus Write

Cycle

4th Bus Write

Cycle

5th Bus Write

Cycle

6th Bus Write

Cycle

AddDataAdd

Data

AddDataAdd

Data

AddData

Add

Data

Byte Program

0x#555

0xAA

0x#AAA

0x55

0x#555

0xA0

(Note 1)

Data

(Note 1)

Sector Erase

(partial erase in units of

4KB)

0x#555

0xAA

0x#AAA

0x55

0x#555

0x80

0x#555

0xAA

0x#AAA

0x55

(Note 2)

0x30

Chip Erase

(all erase)

0x#555

0xAA

0x#AAA

0x55

0x#555

0x80

0x#555

0xAA

0x#AAA

0x55

0x#555

0x10

Product ID Entry

0x#555

0xAA

0x#AAA

0x55

0x#555

0x90

Product ID Exit

0xXX

0xF0

---

Security Program

0x#555

0xAA

0x#AAA

0x55

0x#555

0xA5

0xFF7F

0x00

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