TMP86FS23UG datasheet(234/252 Pages) TOSHIBA

234 / 252 page

Page 222

19. Serial PROM Mode

19.13 Specifying the Erasure Area

TMP86FS23UG

19.13Specifying the Erasure Area

In the flash memory erasing mode, the erasure area of the flash memory is specified by n

−2 byte data.

The start address of an erasure area is specified by ERASTA, and the end address is specified by ERAEND.

If ERASTA is equal to or smaller than ERAEND, the sector erase (erasure in 4 kbyte units) is executed. Executing

the sector erase while the read protection is enabled results in an infinite loop.

If ERASTA is larger than ERAEND, the chip erase (erasure of an entire flash memory area) is executed and the

read protection is disabled. Therefore, execute the chip erase (not sector erase) to disable the read protection.

Note: When the sector erase is executed for the area containing no flash cell, TMP86FS23UG stops the UART communi-

cation and enters the halt condition.

19.14Port Input Control Register

In the serial PROM mode, the input level is fixed to the all ports except P11 and P10 ports with a hardware feature

to prevent overlap current to unused ports. (All port inputs and peripheral function inputs shared with the ports

become invalid.) Therefore, to access to the flash memory in the RAM loader mode without UART communication,

port inputs must be valid. To make port inputs valid, set the pin of the port input control register (SPCR) to “1”.

The SPCR register is not operated in the MCU mode.

Erasure Area Specification Data (n

−2 byte data)

765

43210

ERASTA

ERAEND

ERASTA

The start address of the

erasure area

0000:

0001:

0010:

0011:

0100:

0101:

0110:

0111:

1000:

1001:

1010:

1011:

1100:

1101:

1110:

1111:

from 0000H

from 1000H

from 2000H

from 3000H

from 4000H

from 5000H

from 6000H

from 7000H

from 8000H

from 9000H

from A000H

from B000H

from C000H

from D000H

from E000H

from F000H

ERAEND

The end address of the

erasure area

0000:

0001:

0010:

0011:

0100:

0101:

0110:

0111:

1000:

1001:

1010:

1011:

1100:

1101:

1110:

1111:

to 0FFFH

to 1FFFH

to 2FFFH

to 3FFFH

to 4FFFH

to 5FFFH

to 6FFFH

to 7FFFH

to 8FFFH

to 9FFFH

to AFFFH

to BFFFH

to CFFFH

to DFFFH

to EFFFH

to FFFFH

TMP86FS23UG Datasheet(PDF) 234 Page - Toshiba Semiconductor

TMP86FS23UG Datasheet(HTML) 234 Page - Toshiba Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL