DF2345TE20 Renesas Electronics America, DF2345TE20 Datasheet - Page 614

• Manufacturer Part Number: DF2345TE20
• Description: MCU 5V 128K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2345TE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 71
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 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: -
• Other names: HD64F2345TE20; HD64F2345TE20

Section 17 ROM
The error protect function has no effect on illegal operations unrelated to the setting conditions for
the FLER bit. Also, if a significant amount of time has elapsed before the transition to the protect
status, there is a possibility that the data in flash memory may already have become corrupted.
Consequently, this function is not able to provide complete protection against corruption of the
data in flash memory.
For this reason, it is necessary to run program and erase algorithms correctly while flash write
enable (FWE) is being applied and to monitor the internal operation of the microcomputer for
abnormalities using a watchdog timer, or the like, in order to prevent illegal operations of the sort
mentioned above. Also, at the point when the transition is made to the protect mode, in some cases
the flash memory may be in an erroneously programmed or erased status, or the programming or
erasing may be incomplete due to a forced shutdown. In such a case, make sure to force a recovery
Rev. 4.00 Feb 15, 2006 page 588 of 900
REJ09B0291-0400
Legend:
RD: Memory read possible
VF:
PR: Programming possible
ER: Erasing possible
RD VF PR ER FLER = 0
Normal operating mode
Verify-read possible
Program mode
Erase mode
occurrence
RD VF PR ER FLER = 1
Error protection mode
Error
P = 1 or
E = 1
Figure 17.23 Flash Memory State Transitions
P = 0 and
E = 0
Error occurrence
(software standby)
RD VF PR ER FLER = 0
RD: Memory read not possible
VF:
PR: Programming not possible
ER: Erasing not possible
RES = 0 or STBY = 0
read verify mode
Software
standby mode
Software standby
mode release
Verify-read not possible
Memory
Reset release and
hardware standby release
and software standby release
RES = 0 or
STBY = 0
RES = 0 or
FLMCR1, FLMCR2 (except FLER
bit), EBR1, EBR2 initialization state
RD VF PR ER FLER = 1
STBY = 0
Error protection mode
(software standby)
Reset or hardware standby
RD VF PR ER FLER = 0
RES = 0 or STBY = 0
(hardware protection)
or software standby
FLMCR1, FLMCR2,
EBR1, EBR2
initialization state