HD64F2638F20J Renesas Electronics America, HD64F2638F20J Datasheet - Page 835

• Manufacturer Part Number: HD64F2638F20J
• Description: IC H8S MCU FLASH 256K 128-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2600r

Specifications of HD64F2638F20J

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: CAN, SCI, SmartCard
• Peripherals: Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 72
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Example in which Flash Memory Block Area EB0 is Overlapped
1. Set bits RAMS, RAM2 to RAM0 in RAMER to 1, 0, 0, 0, to overlap part of RAM onto the
2. Real-time programming is performed using the overlapping RAM.
3. After the program data has been confirmed, the RAMS bit is cleared, releasing RAM overlap.
4. The data written in the overlapping RAM is written into the flash memory space (EB0).
Notes: 1. When the RAMS bit is set to 1, program/erase protection is enabled for all blocks
REJ09B0103-0800 Rev. 8.00
May 28, 2010
area (EB0) for which real-time programming is required.
2. A RAM area cannot be erased by execution of software in accordance with the erase
3. Block area EB0 contains the vector table. When performing RAM emulation, the
regardless of the value of RAM2 to RAM0 (emulation protection). In this state, setting
the P or E bit in flash memory control register 1 (FLMCR1), will not cause a transition
to program mode or erase mode. When actually programming or erasing a flash
memory area, the RAMS bit should be cleared to 0.
vector table is needed in the overlap RAM.
algorithm while flash memory emulation in RAM is being used.
H'01FFFF
H'000C00
H'000000
H'000400
H'000800
H'001000
Figure 21A-16 Example of RAM Overlap Operation
Flash memory
EB4 to EB9
EB0
EB1
EB2
EB3
This area can be accessed
from both the RAM area
and flash memory area
On-chip RAM
H'FFE000
H'FFE3FF
H'FFEFBF
Section 21A ROM
(H8S/2636 Group)
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