HD64F3644DV Renesas Electronics America, HD64F3644DV Datasheet - Page 176

• Manufacturer Part Number: HD64F3644DV
• Description: IC H8/3644 MCU FLASH 64QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Lr

Specifications of HD64F3644DV

• Core Processor: H8/300L
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI
• Peripherals: PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 6 ROM
High-Speed, High-Reliability Erasing: The flash memory in the H8/3644F, H8/3643F, and
H8/3642AF uses a high-speed, high-reliability erasing procedure. This procedure provides higher
erasing speed without subjecting the device to voltage stress and without sacrificing the reliability
of data reliability.
Figure 6.19 shows the basic high-speed, high-reliability erasing flowchart. Tables 6.15 and 6.16
list the electrical characteristics during erasing.
Rev. 6.00 Sep 12, 2006 page 154 of 526
REJ09B0326-0600
Note: * Follow the high-speed, high-reliability programming flowchart in programming all bits.
Address + 1
If 0 has already been written, perform programming for unprogrammed bits.
address
Figure 6.19 High-Speed, High-Reliability Erasing
No
Erase setup/erase command
Erase-verify command
Program all bits to 0 *
Last address?
Wait (10 ms)
Address = 0
Wait (6 s)
n + 1
Verify?
n = 0
Start
End
OK
Yes
n
NG
n = 3000?
Error
Yes
No