M30802FCGP#D3 Renesas Electronics America, M30802FCGP#D3 Datasheet - Page 292

IC M16C MCU FLASH 128K 144LQFP

M30802FCGP#D3

Manufacturer Part Number
M30802FCGP#D3
Description
IC M16C MCU FLASH 128K 144LQFP
Manufacturer
Renesas Electronics America
Series
M16C™ M16C/80r
Datasheet

Specifications of M30802FCGP#D3

Core Processor
M16C/80
Core Size
16-Bit
Speed
20MHz
Connectivity
SIO, UART/USART
Peripherals
DMA, PWM, WDT
Number Of I /o
121
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
10K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 10x10b, D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
144-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-

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Precautions on CPU Rewrite Mode
9
0 .
8 /
B
Described below are the precautions to be observed when rewriting the flash memory in CPU rewrite
mode.
0
0
(1) Operation speed
(2) Instructions inhibited against use
(3) Interrupts inhibited against use
(4) Reset
(5) Access disable
(6) How to access
(7)Writing in the user ROM area
(8)Using the lock bit
0
1
A
During CPU rewrite mode, set the BCLK as shown below using the main clock division register (ad-
dress 000C
6.25 MHz or less when wait bit (bit 2 at address 0005
12.5 MHz or less when wait bit (bit 2 at address 0005
The instructions listed below cannot be used during CPU rewrite mode because they refer to the
internal data of the flash memory:
UND instruction, INTO instruction, JMPS instruction, JSRS instruction, and BRK instruction
The address match interrupt cannot be used during CPU rewrite mode because they refer to the
internal data of the flash memory. If interrupts have their vector in the variable vector table, they can be
used by transferring the vector into the RAM area. The NMI and watchdog timer interrupts each can
be used to change the CPU rewrite mode select bit forcibly to normal mode (FMR01="0") upon occur-
rence of the interrupt. Since the rewrite operation is halted when the NMI and watchdog timer inter-
rupts occur, set the CPU rewite mode select bit to "1" and the erase/program operation needs to be
performed over again.
Reset input is always accepted.
Write CPU rewrite mode select bit, flash memory power supply-OFF bit and user ROM area select bit
in an area other than the internal flash memory.
For CPU rewrite mode select bit, lock bit disable bit, and flash memory power supply-OFF bit to be set
to “1”, the user needs to write a “0” and then a “1” to it in succession. When it is not this procedure, it
is not enacted in “1”. This is necessary to ensure that no interrupt or DMA transfer will be executed
during the interval.
Write to the CPU rewrite mode select bit when NMI pin is "H" level.
If power is lost while rewriting blocks that contain the flash rewrite program with the CPU rewrite mode,
those blocks may not be correctly rewritten and it is possible that the flash memory can no longer be
rewritten after that. Therefore, it is recommended to use the standard serial I/O mode or parallel I/O
mode to rewrite these blocks.
To use the CPU rewrite mode, use a boot program that can set and cancel the lock command.
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Page 279
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) = 0 (without internal access wait state)
) = 1 (with internal access wait state)
_______
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30. CPU Rewrite Mode

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