DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 659

• 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: -

(5)
In response to the inquiry on frequency multipliers, the boot program returns information on the
settable frequency multipliers or divisors.
Command
Response
⎯ Command H'22 (1 byte): Inquiry on frequency multipliers
⎯ Response H'32 (1 byte): Response to the inquiry on frequency multipliers
⎯ Size (1 byte): The total length of the number of frequency types, number of multipliers, and
⎯ Number of frequency types (1 byte): The number of operating clocks for which multipliers
⎯ Number of multipliers (1 byte): The number of multipliers selectable for the operating
⎯ Multiplier (1 byte):
⎯ SUM (1 byte): Checksum
Inquiry on frequency multipliers
multiplier fields.
can be selected
(for example, if frequency multiplier settings can be made for the frequencies of the main
and peripheral operating clocks, the value should be H'02).
frequency of the main or peripheral modules
Multiplier: Numerical value in the case of frequency multiplication (e.g. H'04 for ×4)
Divisor: Two’s complement negative numerical value in the case of frequency division
(e.g. H'FE [-2] for ×1/2)
As many multiplier fields are included as there are multipliers or divisors, and
combinations of the number of frequency types are repeated as many times as there are
operating clocks.
H'22
H'32
No. of multipliers
…
SUM
Size
Multiplier
No. of frequency
types
…
Rev. 5.00 Mar. 06, 2009 Page 639 of 770
REJ09B0243-0500