DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 645

• Manufacturer Part Number: DF71251AD50FPV
• Description: MCU RISC FLASH 32K 8K 64LQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH Tinyr

Specifications of DF71251AD50FPV

• Core Processor: SH-2
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 37
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

17.6.2
Software protection is set up in any of two ways: by disabling the downloading of on-chip
programs for programming and erasing and by means of a key code.
Table 17.9 Software Protection
17.6.3
Error protection is a mechanism for aborting programming or erasure when an error occurs, in the
form of the microcomputer getting out of control during programming/erasing of the flash
memory or operations that are not in accordance with the established procedures for
programming/erasing. Aborting programming or erasure in such cases prevents damage to the
flash memory due to excessive programming or erasing.
If the microcomputer malfunctions during programming/erasing of the flash memory, the FLER
bit in FCCS is set to 1 and the LSI enters the error protection state, thus aborting programming or
erasure.
The FLER bit is set to 1 in the following conditions:
• When the relevant bank area of flash memory is read during programming/erasing (including a
• When a SLEEP instruction (including software standby mode) is executed during
Error protection is cancelled (FLER bit is cleared) only by a power-on reset.
Item
Protection by the
SCO bit
Protection by FKEY
vector read or an instruction fetch)
programming/erasing
Software Protection
Error Protection
Description
Clearing the SCO bit in FCCS disables
downloading of the programming/erasing
program, thus making the LSI enter a
programming/erasing-protected state.
Downloading and programming/erasing
are disabled unless the required key code
is written in FKEY. Different key codes are
used for downloading and for
programming/erasing.
Rev. 5.00 Mar. 06, 2009 Page 625 of 770
Download
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√
Function to be Protected
REJ09B0243-0500
Programming/
Erasure
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