DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 635

• 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: -

17.5.2
The user MAT can be programmed/erased in user program mode.
Programming/erasing is executed by downloading the program in the microcomputer.
The overview flow is shown in figure 17.9.
High voltage is applied to internal flash memory during the programming/erasing processing.
Therefore, transition to reset must not be executed. Doing so may cause damage or destroy flash
memory. If reset is executed accidentally, the reset signal must be released after the reset input
period, which is longer than the normal 100 μs.
For details on the programming procedure, see the description in section 17.5.2 (2), Programming
Procedure in User Program Mode. For details on the erasing procedure, see the description in
section 17.5.2 (3), Erasing Procedure in User Program Mode.
User Program Mode (Only in On-Chip 128-Kbyte and 64-Kbyte ROM Version)
program data is prepared
transferred to the on-chip
Programming/erasing
Programming/erasing
When programming,
Programming/erasing
procedure program is
RAM and executed
Figure 17.9 Programming/Erasing Overview Flow
FWE = 1 ?
start
end
Yes
No
1. Inputting high level to the FWE pin sets the
2. Programming/erasing is executed only in
3. After programming/erasing is finished, low level
must be input to the FWE pin for protection.
FWE bit to 1.
the on-chip RAM.
Rev. 5.00 Mar. 06, 2009 Page 615 of 770
REJ09B0243-0500