DF3048X16V Renesas Electronics America, DF3048X16V Datasheet - Page 656

• Manufacturer Part Number: DF3048X16V
• Description: MCU 5V 128K,PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3048X16V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K 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 19 Flash Memory (H8/3048F: Dual Power Supply (V
Example of Emulation of Real-Time Flash-Memory Update
Rev. 7.00 Sep 21, 2005 page 630 of 878
REJ09B0259-0700
Small-block
area (SB5)
Notes: 1. When part of RAM (H'FFF000 to H'FFF1FF) is overlapped onto a small-block area in flash
2. When the RAMS bit is set to 1, all flash memory blocks are write-protected and erase-protected,
memory, the overlapped flash memory area cannot be accessed. Access is enabled when the
overlap is cleared.
regardless of the values of bits RAM2 to RAM0. In this state, no transition to program or erase
mode will take place if the P or E bit is set in the flash memory control register (FLMCR). To
actually program or erase a flash memory area, the RAMS bit must be cleared to 0.
H'01F000
H'01F9FF
H'01FA00
H'01FBFF
H'01FDFF
H'01FE00
H'01FFFF
address space
Flash memory
Figure 19.14 Example of RAM Overlap
H'FFEF10
H'FFF000
H'FFF1FF
H'FFF200
H'FFFF0F
Overlapped by RAM
On-chip RAM
area
PP
= 12 V))
Procedure
1. Set the RAME bit to 1 in SYSCR
2. Overlap part of RAM (H'FFF000
3. Perform real-time updates in the
4. After finalization of the update
5. Program the data written in RAM
to enable the on-chip RAM.
to H'FFF1FF) onto the area
requiring real-time update (SB5).
(Set RAMCR bits 3 to 0 to
1101.)
overlapping RAM.
data, clear the RAM overlap (by
clearing the RAMS bit).
addresses H'FFF000 to
H'FFF1FF into the flash memory
area.