DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 660

• 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: -

(6)
In response to the inquiry on operating frequency, the boot program returns the number of
operating frequencies and the maximum and minimum values.
Rev. 5.00 Mar. 06, 2009 Page 640 of 770
REJ09B0243-0500
Command
Response
⎯ Command H'23 (1 byte): Inquiry on operating frequency
⎯ Response H'33 (1 byte): Response to the inquiry on operating frequency
⎯ Size (1 byte): The total length of the number of frequency types, and maximum and
⎯ Number of frequency types (1 byte): The number of operating clock frequencies required
⎯ Minimum value of operating frequency (2 bytes): The minimum frequency of a frequency-
⎯ Maximum value of operating frequency (2 bytes): The maximum frequency of a frequency-
⎯ SUM (1 byte): Checksum
Inquiry on operating frequency
minimum values of operating frequency fields.
within the device.
For example, the value two indicates main and peripheral operating clock frequencies.
multiplied or -divided clock signal.
The value in this field and in the maximum value field is the frequency in MHz to two
decimal places, multiplied by 100 (for example, if the frequency is 20.00 MHz, the value
multiplied by 100 is 2000, so H'07D0 is returned here).
multiplied or -divided clock signal.
As many pairs of minimum values are included as there are frequency types.
H'33
Operating freq. (min)
…
SUM
H'23
Size
No. of frequency types
Operating freq. (max)