m30262f8gp Renesas Electronics Corporation., m30262f8gp Datasheet - Page 198

• Manufacturer Part Number: m30262f8gp
• Description: Renesas 16-bit Cmos Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

192
CPU Rewrite Mode (Flash Memory Version)
Figure 1.20.1. Flash memory control registers 0, 1
Preliminary Specifications Rev. 0.9
Flash memory control register 4
Flash memory control register 0
Flash memory control register 1
b7 b6 b5 b4 b3 b2 b1 b0
b7 b6 b5 b4 b3 b2 b1 b0
b7 b6 b5 b4 b3 b2 b1 b0
0
Specifications in this manual are tentative and subject to change.
Note 1: To set this bit to "1", write a "0" and then a "1" to it in succession. Make sure no interrupts or DMA
Note 2: To set this bit to "1", first ensure that the CPU rewrite mode select bit is set = "1"; then write a "0"
Note 3: Effective only when the CPU rewrite mode select bit = "1". After writing "1", write "0" when RY/BY
Note 4: This bit becomes valid only when FMR40 = "1" and when in an erase operation.
Note 5: Write to this bit from a program in other than the flash memory.
Note 6: This flag is cleared to "0" by executing the Clear Status command.
Note 7: In cases where E/W cycles to Block A or B exceed 100 times (D7, D9, U7, U9), please set this bit
0
0
0
0
0
transfers occur before completion of these two write operations. While in EW0 mode, write to this
bit from a program located in other than flash memory.
followed by a "1" to FMR02 in succession. Make sure no interrupts or DMA transfers occur before
completion of these last two successive write operations. Additionally, bit FMR01 must also be set
to "1" prior to setting this bit to a "1".
status flag is "1".
•
•
to "1" (with wait). When FMR17 is set to "1", one wait state is inserted per access to Block A or B -
regardless of the value of PM17. Wait state insertion during access to all other blocks, as well as
to internal RAM, is controlled by PM17 - regardless of the setting of FMR17.
set to "1" by program. (Writing "0" is available.)
In EW0 mode, this bit can be set to "0" or "1" by program.
In EW1 mode, this bit is automatically set to "1" when a maskable interrupt occurs. It can NOT be
0
0
1
0
1
Reserved bit
Nothing is assigned.
In an attempt to write to these bits, write 0. The value, if read, turns out to be
indeterminate.
Bit symbol
Bit symbol
FMR11
FMR17
Bit symbol
FMR46
FMR06
FMR07
FMSTP
Reserved bits
FMR40
FMR41
Reserved bits
Reserved bits
FMR00
FMR01
FMR02
Reserved bit
Reserved bits
Symbol
Symbol
Symbol
FMR0
FMR1
FMR4
Renesas Technology Corp.
(Note 3, Note 5)
RY/BY status flag
EW entry bit
(Note 1)
8Kbyte EW mode enable bit
(Note 2)
EW mode select bit (Note 1)
Suspend enable (Note 1)
Suspend request (Note 4)
Suspend status
Flash memory reset bit
Blocks A and B access wait
bit (Note 7)
Erase status flag (Note 6)
Program status flag (Note 6)
Bit name
Bit name
Bit name
Address
Address
Address
01B7
01B5
01B3
16
16
16
When reset
When reset
When reset
0XX00101
00000001
01000000
Must always be set to "1"
0: EW0 mode
1: EW1 mode
Must always be set to "1"
Must always be set to "0"
0: PM17 controls wait state insertion
1: Wait state inserted (1 wait)
0: Busy (being written or erased)
1: Ready
0: Normal mode
1: EW mode
0: EW mode disabled on 8Kbyte blocks
1: EW mode enabled on 8Kbyte blocks
0: Normal operation
1: Reset
Must always be set to 0
1: Error
0: Invalid
1: Valid
0: Erase restart
1: Suspend request
0: Pass
1: Error
0: Pass
Must always be set to 0
Must always be set to 0
0: Erase Active
1: Erase Inactive
(Software commands invalid)
(Software commands acceptable)
2
2
2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Function
Function
Function
R W
M16C/26 Group
R W
R W