R4F24278NVFQU Renesas Electronics America, R4F24278NVFQU Datasheet - Page 1194

• 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
23.12
This LSI has user boot mode in which the LSI is activated with mode pin settings different from
those in user program mode and boot mode. A user-arbitrary boot mode different from the boot
mode using the on-chip SCI can be enabled.
Only the user ROM and data flash can be programmed/erased in user boot mode.
Programming/erasing of user boot ROM is enabled only in boot mode or programmer mode.
(1)
When a hardware reset is issued with the mode pins set to mode 5, this LSI enters user boot mode
and the built-in check routine runs. The user ROM, data flash, and user boot ROM states will be
checked.
While the check routine is running, NMI and all other interrupts cannot be accepted.
Next, processing starts from the execution start address of the reset vector in user boot ROM. At
this point, the FMMS bit in FLMMATS is set to 1 because user boot ROM has been selected as
the execution memory MAT.
(2)
For programming the user ROM in user boot mode, additional processing made by setting the
FMMS bit in FLMMATS is required: switching from the user boot ROM to the user ROM, and
switching back to the user boot ROM after programming completes.
Figure 23.10 shows the procedure for programming the user ROM in user boot mode.
Page 1164 of 1448
Initiation in User Boot Mode
User ROM Programming in User Boot Mode
User Boot Mode
H8S/2427, H8S/2427R, H8S/2425 Group
REJ09B0565-0100 Rev. 1.00
Jul 22, 2010