DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 608

• Manufacturer Part Number: DF3052BX25V
• Description: MCU 5V 512K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3052BX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 18 ROM
On-Chip RAM Area Divisions in Boot Mode: In boot mode, the RAM area is divided into an
area used by the boot program and an area to which the programming control program is
transferred via the SCI, as shown in figure 18.8. The boot program area cannot be used until the
execution state in boot mode switches to the programming control program transferred from the
host.
Notes: 1. The boot program area cannot be used until a transition is made to the execution state
Notes on Using the Boot Mode
1. When this LSI comes out of reset in boot mode, it measures the low period the input at the
2. If any data has been written to the flash memory (if all data is not H'FF), all flash memory
3. Interrupts cannot be used during programming or erasing of flash memory.
4. The RXD
Rev. 3.00 Mar 21, 2006 page 578 of 814
REJ09B0302-0300
SCI’s RXD
states for this LSI to get ready to measure the low period of the RXD
blocks are erased when this mode is executed. Therefore, boot mode should be used for initial
on-board programming, or for forced recovery if the program to be activated in user program
mode is accidentally erased and user program mode cannot be executed, for example.
2. In flash memory emulation by RAM, part (H'FE000 to H'FEFFF) of the user program
for the programming control program transferred to RAM. Note also that the boot
program remains in this area of the on-chip RAM even after control branches to the
programming control program.
transfer area is used as the area in which emulation is performed, and therefore the user
program must not be transferred to this area.
1
and TXD
1
pin. The reset should end with RXD
1
pins should be pulled up on the board.
Figure 18.8 RAM Areas in Boot Mode
Boot program area
Programming
program area
control
1
high. After the reset ends, it takes about 100
H'FFDF10
H'FFE70F
H'FFE710
H'FFFF0F
1
input.