M32CSLASH86 datasheet(422/505 Pages) RENESAS

422 / 505 page

Page 399

25. Flash Memory Version

)

(

25.3.3.1 FMR00 Bit

The FMR00 bit indicates the flash memory operating state. It is set to "0" while the program, block

erase, erase all unlocked block, lock bit program, or read lock bit status command is being executed;

otherwise, it is set to "1".

25.3.3.2 FMR01 Bit

The microcomputer can accept commands when the FMR01 bit is set to "1" (CPU rewrite mode). Set

the FMR05 bit to "1" (user ROM area access) as well if in boot mode.

25.3.3.3 FMR02 Bit

The lock bit is invalid by setting the FMR02 bit to "1" (lock bit disabled). (Refer to 25.3.6 Data Protect

Function.) The lock bit is valid by setting the FMR02 bit to "0" (lock bit enabled).

The FMR02 bit does not change the lock bit status but disables the lock bit function. If the block erase

or erase all unlocked block command is executed when the FMR02 bit is set to "1", the lock bit status

changes "0" (locked) to "1" (unlocked) after command execution is completed.

Figure 25.5 FMR1 Register

Flash Memory Control Register 1

Symbol

Address

After Reset

FMR1

005516

0000 01012

FMR11

(b0)

(b3 - b2)

(b5 - b4)

(b7)

FMR16

EW Mode Select Bit(1)

Lock Bit Status Flag

Bit Name

Function

Bit

Symbol

0 : EW mode 0

1 : EW mode 1

0 : Locked

1 : Unlocked

Reserved Bit

Set to "0"

Reserved Bit

NOTES:

1. Set the FMR11 bit to "1" in 8-bit unit immediately after setting it first to "0" while the FMR01 bit is set to "1".

Do not generate an interrupt or a DMA transfer between setting the FMR11 bit to "0" and setting it to "1".

Set it while the NMI pin is held "H".

If the FMR01 bit is set to "0", the FMR01 bit and FMR11 bit are both set to "0".

Set to "0"

When read,

its content is indeterminate

When read,

its content is indeterminate

M32C/86 Datasheet(PDF) 422 Page - Renesas Technology Corp

M32C/86 Datasheet(HTML) 422 Page - Renesas Technology Corp

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