R4F24278NVFQU Renesas Electronics America, R4F24278NVFQU Datasheet - Page 1198

• Manufacturer Part Number: R4F24278NVFQU
• Description: MCU 512K/48K 2.7-5.5V 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of R4F24278NVFQU

• Core Processor: H8S/2600
• Core Size: 16/32-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, I²C, IrDA, SCI, Smart Card, SPI, SSU, UART/USART
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 98
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 64K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-LQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Section 23 Flash Memory
23.13
It is possible to switch between user ROM and user boot ROM. However, the following procedure
is required because the start addresses of these MATs are allocated to the same address 0.
(Switching to the user boot ROM disables programming and erasing. Programming of the user
boot ROM should take place in boot mode or programmer mode.)
1. Memory MAT switching by the FMMS bit in FLMMATS should always be executed from the
2. When accessing the memory MAT immediately after switching the memory MATs by
3. If an interrupt request has occurred during memory MAT switching, there is no guarantee of
4. After the memory MATs have been switched, take care because the interrupt vector tables will
5. The size of the user ROM is different from that of the user boot ROM. Addresses which
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on-chip RAM.
modifying the FMMS bit in FLMMATS from the on-chip RAM, similarly execute four NOP
instructions in the on-chip RAM (this prevents access to the flash memory during memory
MAT switching).
which memory MAT is accessed. Always mask the maskable interrupts before switching
memory MATs. In addition, configure the system so that NMI interrupts do not occur during
memory MAT switching.
also have been switched.
exceed the size of the 16-Kbyte user boot ROM area should not be accessed. If a user boot
ROM area of a size greater than 16 Kbytes is accessed, data is read as an undefined value.
Switching between User ROM and User Boot ROM
H8S/2427, H8S/2427R, H8S/2425 Group
REJ09B0565-0100 Rev. 1.00
Jul 22, 2010