HD64F2638F20J Renesas Electronics America, HD64F2638F20J Datasheet - Page 836

• 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: -

Section 21A ROM
(H8S/2636 Group)
21A.12 Interrupt Handling when Programming/Erasing Flash Memory
All interrupts, including NMI interrupt is disabled when flash memory is being programmed or
erased (when the P or E bit is set in FLMCR1), and while the boot program is executing in boot
mode *
1. Interrupt during programming or erasing might cause a violation of the programming or
2. In the interrupt exception handling sequence during programming or erasing, the vector would
3. If interrupt occurred during boot program execution, it would not be possible to execute the
For these reasons, in on-board programming mode alone there are conditions for disabling
interrupt, as an exception to the general rule. However, this provision does not guarantee normal
erasing and programming or MCU operation. All requests, including NMI interrupt, must
therefore be restricted inside and outside the MCU when programming or erasing flash memory.
NMI interrupt is also disabled in the error-protection state while the P or E bit remains set in
FLMCR1.
Notes: 1. Interrupt requests must be disabled inside and outside the MCU until the programming
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erasing algorithm, with the result that normal operation could not be assured.
not be read correctly *
normal boot mode sequence.
1
, to give priority to the program or erase operation. There are three reasons for this:
2. The vector may not be read correctly in this case for the following two reasons:
control program has completed programming.
•
•
If flash memory is read while being programmed or erased (while the P or E bit is
set in FLMCR1), correct read data will not be obtained (undetermined values will
be returned).
If the interrupt entry in the vector table has not been programmed yet, interrupt
exception handling will not be executed correctly.
2
, possibly resulting in MCU runaway.
H8S/2639, H8S/2638, H8S/2636,
REJ09B0103-0800 Rev. 8.00
H8S/2630, H8S/2635 Group
May 28, 2010