M306N4FGTFP Renesas Electronics America, M306N4FGTFP Datasheet - Page 286

• Manufacturer Part Number: M306N4FGTFP
• Description: IC M16C MCU FLASH 100QFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/6Nr

Specifications of M306N4FGTFP

• Core Processor: M16C/60
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: CAN, I²C, IEBus, SIO, UART/USART
• Peripherals: DMA, WDT
• Number Of I /o: 85
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 26x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

M16C/6N Group (M16C/6N4)
Rev.2.40
REJ09B0009-0240
21.3.4 Notes on CPU Rewrite Mode
21.3.4.1 Operating Speed
21.3.4.2 Prohibited Instructions
21.3.4.3 Interrupts (EW0 Mode)
21.3.4.4 Interrupts (EW1 Mode)
21.3.4.5 How to Access
21.3.4.6 Rewriting in User ROM Area (EW0 Mode)
21.3.4.7 Rewriting in User ROM Area (EW1 Mode)
21.3.4.8 DMA Transfer
Before entering CPU rewrite mode (EW0 or EW1 mode), set the CM11 bit in the CM1 register to 0 (main
clock), select 10 MHz or less for CPU clock using the CM06 bit in the CM0 register and bits CM17 to
CM16 in the CM1 register. Also, set the PM17 bit in the PM1 register to 1 (with wait state).
The following instructions cannot be used in EW0 mode because the CPU tries to read data in flash
memory: the UND instruction, INTO instruction, JMPS instruction, JSRS instruction, and BRK instruction
• To use interrupts having vectors in a relocatable vector table, the vectors must be relocated to the RAM
• The NMI and watchdog timer interrupts are available since registers FMR0 and FMR1 are forcibly reset
• The address match interrupt is not available since the CPU tries to read data in the flash memory.
• Do not acknowledge any interrupts with vectors in the relocatable vector table or address match interrupt
• Do not use the watchdog timer interrupt.
• The NMI interrupt is available since registers FMR0 and FMR1 are forcibly reset when the interrupt
To set the FMR01, FMR02 or FMR11 bit to 1, write 1 after first setting the bit to 0. Do not generate an
interrupt or a DMA transfer between the instruction to set the bit to 0 and the instruction to set the bit to
1. Set the bit while an “H” signal is applied to the NMI pin.
If the supply voltage drops while rewriting the block where the rewrite control program is stored, the flash
memory cannot be rewritten because the rewrite control program is not correctly rewritten. If this error
occurs, rewrite the user ROM area while in standard serial I/O mode, parallel I/O mode, or CAN I/O
mode.
Avoid rewriting any block in which the rewrite control program is stored.
In EW1 mode, do not perform a DMA transfer while the FMR00 bit in the FMR0 register is set to 0 (auto-
programming or auto-erasure).
area.
when either interrupt request is generated. Allocate the jump addresses for each interrupt service
routines to the fixed vector table. Flash memory rewrite operation is suspended when the NMI or
watchdog timer interrupt request is generated. Execute the rewrite program again after exiting the
interrupt routine.
during auto-programming or auto-erasure.
request is generated. Allocate the jump address for the interrupt service routine to the fixed vector table.
Flash memory rewrite operation is suspended when the NMI interrupt request is generated. Execute the
rewrite program again after exiting the interrupt service routine.
Apr 14, 2006
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21. Flash Memory Version
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