DF3048BVX25V Renesas Electronics America, DF3048BVX25V Datasheet - Page 641

• Manufacturer Part Number: DF3048BVX25V
• Description: MCU 3/5V 128K PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3048BVX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K 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: Lead free / RoHS Compliant
• Eeprom Size: -

The error protection function is invalid for abnormal operations other than the FLER bit setting
conditions. Also, if a certain time has elapsed before this protection state is entered, damage may
already have been caused to the flash memory. Consequently, this function cannot provide
complete protection against damage to flash memory.
To prevent such abnormal operations, therefore, it is necessary to ensure correct operation in
accordance with the program/erase algorithm, with the flash write enable (FWE) voltage applied,
and to conduct constant monitoring for MCU errors, internally and externally, using the watchdog
timer or other means. There may also be cases where the flash memory is in an erroneous
programming or erroneous erasing state at the point of transition to this protection mode, or where
programming or erasing is not properly carried out because of an abort. In cases such as these, a
forced recovery (program rewrite) must be executed using boot mode. However, it may also
happen that boot mode cannot be normally initiated because of overprogramming or overerasing.
(When High Level Is Applied to FWE Pin in Mode 5, 6, and 7 (On-Chip ROM Enabled))
Legend:
RD: Memory read possible
VF:
PR: Programming possible
ER: Erasing possible
RD VF PR ER FLER = 0
Verify-read possible
Program mode
Section 18 ROM (H8/3048F-ONE: Single Power Supply, H8/3048B Mask ROM Version)
Erase mode
RD VF PR ER FLER = 1
Error
occurrence
Error protection mode
Figure 18.15 Flash Memory State Transitions
Error occurrence
(software standby)
WDT reset, RES = 0 or STBY = 0
RD: Memory read not possible
VF:
PR: Programming not possible
ER: Erasing not possible
INIT: Register initialization state
Software
standby mode
Software standby
mode release
Verify-read not possible
WDT reset,
RES = 0 or
STBY = 0
Rev. 3.00 Sep 27, 2006 page 613 of 872
RD VF PR ER INIT FLER = 1
WDT reset,
RES = 0 or
STBY = 0
Error protection mode
RD VF PR ER INIT FLER = 0
(software standby)
FLMCR1, EBR
initialization state
(hardware protection)
Reset or standby
FLMCR1, FLMCR2,
EBR initialization
state
REJ09B0325-0300