HD64F36077GHV Renesas Electronics America, HD64F36077GHV Datasheet - Page 146
HD64F36077GHV
Manufacturer Part Number
HD64F36077GHV
Description
16BIT MCU FLASH 56K, SMD, LQFP64
Manufacturer
Renesas Electronics America
Datasheet
1.HD64F36077GHV.pdf
(524 pages)
Specifications of HD64F36077GHV
No. Of I/o's
47
Ram Memory Size
4KB
Cpu Speed
20MHz
No. Of Timers
4
Digital Ic Case Style
LQFP
Supply Voltage Range
4.5V
Core Size
16bit
Program Memory Size
56KB
Oscillator Type
External Only
Controller Family/series
H8/300H
Peripherals
ADC
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD64F36077GHV
Manufacturer:
RENESAS
Quantity:
340
Part Number:
HD64F36077GHV
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
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Section 7 ROM
7.4.2
When erasing flash memory, the erase/erase-verify flowchart shown in figure 7.4 should be
followed.
1. Prewriting (setting erase block data to all 0s) is not necessary.
2. Erasing is performed in block units. Make only a single-bit specification in the erase block
3. The time during which the E bit is set to 1 is the flash memory erase time.
4. The watchdog timer (WDT) is set to prevent overerasing due to program runaway, etc. An
5. For a dummy write to a verify address, write 1-byte data H'FF to an address whose lower two
6. If the read data is not erased successfully, set erase mode again, and repeat the erase/erase-
7.4.3
All interrupts, including the NMI interrupt, are disabled while flash memory is being programmed
or erased, or while the boot program is executing, for the following three reasons:
1. Interrupt during programming/erasing may cause a violation of the programming or erasing
2. If interrupt exception handling starts before the vector address is written or during
3. If an interrupt occurs during boot program execution, normal boot mode sequence cannot be
Rev. 1.00 Sep. 16, 2005 Page 116 of 490
REJ09B0216-0100
register (EBR1). To erase multiple blocks, each block must be erased in turn.
overflow cycle of approximately 19.8 ms is allowed.
bits are B'00. Verify data can be read in longwords from the address to which a dummy write
was performed.
verify sequence as before. The maximum number of repetitions of the erase/erase-verify
sequence is 100.
algorithm, with the result that normal operation cannot be assured.
programming/erasing, a correct vector cannot be fetched and the CPU malfunctions.
carried out.
Erase/Erase-Verify
Interrupt Handling when Programming/Erasing Flash Memory
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