HD64F3026X25 Renesas Electronics America, HD64F3026X25 Datasheet - Page 548

• Manufacturer Part Number: HD64F3026X25
• Description: MCU 3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3026X25

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 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: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 17 Flash Memory [H8/3026F-ZTAT Version]
17.6.3
Erase Mode
When erasing flash memory, the single-block erase flowchart shown in figure 17.11 should be
followed.
The wait times after bits are set or cleared in the flash memory control register 1 (FLMCR1) and
the maximum number of erase operations (N) are shown in table 21.19 in section 21.2.6, Flash
Memory Characteristics.
To erase flash memory contents, make a 1-bit setting for the flash memory area to be erased in
erase block register 1 and 2 (EBR1, EBR2) at least (t
) µs after setting the SWE bit to 1 in
sswe
FLMCR1. Next, the watchdog timer (WDT) is set to prevent overerasing due to program
runaway, etc. Set a value greater than (t
) ms + (t
+ t
+ t
) µs as the WDT overflow period.
se
sesu
ce
cesu
Preparation for entering erase mode (erase setup) is performed next by setting the ESU bit in
FLMCR1. The operating mode is then switched to erase mode by setting the E bit in FLMCR1
after the elapse of at least (t
) µs. The time during which the E bit is set is the flash memory
sesu
erase time. Ensure that the erase time does not exceed (t
) ms.
se
Note: With flash memory erasing, preprogramming (setting all memory data in the memory to
be erased to all 0) is not necessary before starting the erase procedure.
Rev. 2.00 Sep 20, 2005 page 508 of 800
REJ09B0260-0200