HD64F3048BF25 Renesas Electronics America, HD64F3048BF25 Datasheet - Page 643
HD64F3048BF25
Manufacturer Part Number
HD64F3048BF25
Description
IC H8 MCU FLASH 128K 100QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Hr
Datasheet
1.DF3048BF25V.pdf
(903 pages)
Specifications of HD64F3048BF25
Core Processor
H8/300H
Core Size
16-Bit
Speed
8MHz
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-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
HD64F3048BF25
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
Part Number:
HD64F3048BF25V
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
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18.9
As flash memory programming and erasing takes time, it may be difficult to carry out tuning by
writing parameters and other data in real time. In this case, real-time programming of flash
memory can be emulated by overlapping part of RAM (H'FFF000–H'FFF3FF) onto a small block
area in flash memory. This RAM area change is executed by means of bits 3 to 1 in the RAM
control register (RAMCR). After the RAM area change, access is possible both from the area
overlapped onto flash memory and from the original area (H'FFF000–H'FFF3FF). For details of
RAMCR and the RAM area setting method, see section 18.5.4, RAM Control Register (RAMCR).
Example of Emulation of Real-Time Flash Memory Programming
In the following example, RAM area H'FFF000–H'FFF3FF is overlapped onto flash memory area
EB2 (H'000800–H'000BFF).
Block area
Note: * When part of RAM (H'FFF000 H'FFF3FF) is overlapped onto a flash memory small block area, the flash
EB2
area
Flash Memory Emulation in RAM
Section 18 ROM (H8/3048F-ONE: Single Power Supply, H8/3048B Mask ROM Version)
memory in the overlapped area cannot be accessed. It can be accessed when the overlapping is
cleared.
H'000000
H'000800
H'000BFF
H'000FFF
Figure 18.16 Example of RAM Overlap Operation
Flash memory
space
*
H'FFEF10
H'FFEFFF
H'FFF000
H'FFF3FF
H'FFF400
H'FFFF0F
Overlapping RAM
(Mapping RAM
On-chip RAM
(Actual RAM
area)
area
area)
Rev. 3.00 Sep 27, 2006 page 615 of 872
Procedure:
1. Part of RAM (H'FFF000
2.
3. The programmed data is checked,
4. The data written in RAM area
H'FFF3FF) is overlapped onto the
area (EB2) requiring real-time
programming.
(RAMCR bits 3 1 are set to 1, 1, 0,
and the flash memory area to be
overlapped (EB2) is selected.)
performed using the overlapping
RAM.
then RAM overlapping is cleared.
(RAMS bit is cleared.)
H'FFF000 H'FFF3FF is written to
flash memory space.
Real-time programming is
REJ09B0325-0300
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