DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 649

• 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: -

17.7.2
1. Download Time of On-Chip Program
2. User Branch Processing Intervals
Table 17.10 Initiation Intervals of User Branch Processing
Table 17.11 Initial User Branch Processing Time
3. State in which Interrupts are ignored
Processing Name
Programming
Erasing
Processing Name
Programming
Erasing
The programming program that includes the initialization routine and the erasing program that
includes the initialization routine are each 3 Kbytes or less. Accordingly, when the CPU clock
frequency is 20 MHz, the download for each program takes approximately 10 ms at maximum.
The intervals for executing the user branch processing differ in programming and erasing. The
processing phase also differs. Table 17.10 lists the maximum interval for initiating the user
branch processing when the CPU clock frequency is 50 MHz.
However, when operation is done with CPU clock of 50 MHz, maximum value of the time
until first user branch processing is as shown in table 17.11.
In the following modes or period, interrupt requests are ignored; they are not executed and the
interrupt sources are not retained.
⎯ Boot mode
Other Notes
Max.
Approximately 4 ms
Approximately 25 ms
Maximum Interval
Approximately 4 ms
Approximately 25 ms
Rev. 5.00 Mar. 06, 2009 Page 629 of 770
REJ09B0243-0500