M30280F6HP RENESAS [Renesas Technology Corp], M30280F6HP Datasheet - Page 395

• Manufacturer Part Number: M30280F6HP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES
• Manufacturer: RENESAS [Renesas Technology Corp]

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20.14 Flash Memory Version
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20.14.1 Functions to Inhibit Rewriting Flash Memory Rewrite
20.14.2 Stop Mode
20.14.3 Wait Mode
20.14.4 Low Power Dissipation Mode, On-Chip Oscillator Low Power Dissipation Mode
20.14.5 Writing Command and Data
20.14.6 Program Command
20.14.7 Operation Speed
20.14.8 Instructions Inhibited Against Use
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ID codes are stored in addresses 0FFFDF
and 0FFFFB
in standard serial I/O mode.
The ROMCP register is mapped in address 0FFFFF
memory cannot be read or written in parallel I/O mode.
In the flash memory version of microcomputer, these addresses are allocated to the vector addresses (H)
of fixed vectors. The b3 to b0 in address 0FFFFF
When the microcomputer enters stop mode, execute the instruction which sets the CM10 bit to “1”(stop
mode) after setting the FMR01 bit to “0”(CPU rewrite mode disabled) and disabling the DMA transfer.
When the microcomputer enters wait mode, excute the WAIT instruction after setting the FMR01 bit to
“0”(CPU rewrite mode disabled).
If the CM05 bit is set to “1” (main clock stop), the following commands must not be executed.
Write the command code and data at even addresses.
Write ‘xx40
auto program operation (data program and verify) will start. Make sure the address value specified in the
first bus cycle is the same even address as the write address specified in the second bus cycle.
When CPU clock source is main clock, before entering CPU rewrite mode (EW mode 0 or 1), select 10
MHz or less for CPU clock using the CM06 bit in the CM0 register and the CM17 to CM16 bits in the CM1
register. Also, when CPU clock is f
(EW mode 0 or 1), set the ROCR3 to ROCR2 bits in the ROCR register to “divied by 4” or “divide by 8”.
On both cases, set the PM17 bit in the PM1 register to “1” (with wait state).
The following instructions cannot be used in EW mode 0 because the flash memory’s internal data is
referenced: UND instruction, INTO instruction, JMPS instruction, JSRS instruction, and BRK instruction
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• Program
• Block erase
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’ in the first bus cycle and write data to the write address in the second bus cycle, and an
0
. If wrong data are written to theses addresses, the flash memory cannot be read or written
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(ROC) on-chip oscillator clock, before entering CPU rewrite mode
16
, 0FFFE3
16
are reserved bits. Set these bits to “1111
16
. If wrong data is written to this address, the flash
16
, 0FFFEB
16
, 0FFFEF
16
, 0FFFF3
16
20. Precautions
, 0FFFF7
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”.
16
,