HD64F3644DV Renesas Electronics America, HD64F3644DV Datasheet - Page 169

• 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: -

Examples:
Sample calculations when executing a program in on-chip memory (RAM) at an operating
frequency of 6 MHz
Table 6.12 Watchdog Timer Overflow Interval Settings (Set Value of #e for Operating
Variable
e ( )
6.7.7
Prewrite-verify mode is a verify mode used to all bits to equalize their threshold voltages before
erasure.
To program all bits, write H'00 in accordance with the prewrite algorithm shown in figure 6.15.
Use this procedure to set all data in the flash memory to H'00 after programming. After the
necessary programming time has elapsed, exit program mode (by clearing the P bit to 0) and select
prewrite-verify mode (leave the P, E, PV, and EV bits all cleared to 0). In prewrite-verify mode, a
prewrite-verify voltage is applied to the memory cells at the read address. If the flash memory is
read in this state, the data at the read address will be read. After selecting prewrite-verify mode,
wait at least 4 µs before reading.
Note: For a sample prewriting program, see the prewrite subroutine in the sample erasing
program.
a ( ) =
b ( ) =
c ( ) =
d ( ) =
Prewrite-Verify Mode
Frequencies)
6
5
6
5
6
5
6
5
1953 = 2343.6
f
H'9B
OSC
2
4
= 8 MHz
9 = 10.8
= 16 MHz
=
=
2.4
4.8
2343 = H'0927
10 = H'000A
3
5
f
H'DF
OSC
= 5 MHz
= H'03
= H'05
= 10 MHz
Oscillation Frequency
Operating Frequency
Rev. 6.00 Sep 12, 2006 page 147 of 526
f
H'E5
OSC
= 4 MHz
= 8 MHz
REJ09B0326-0600
f
H'F7
OSC
= 1 MHz
Section 6 ROM
= 2 MHz