DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 81

• 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: -

4.3
Table 4.3 shows the clock operating mode of this LSI.
Table 4.3
The frequency of the external clock input from the EXTAL pin is multiplied by 8 in the PLL
circuit before being supplied to the on-chip modules in this LSI, which eliminates the need to
generate a high-frequency clock outside the LSI. Since the input clock frequency ranging from 10
MHz to 12.5 MHz can be used, the internal clock (Iφ) frequency ranges from 10 MHz to 50 MHz.
Maximum operating frequencies:
Iφ = 50 MHz, Bφ = 40 MHz, Pφ = 40 MHz, and MPφ = 40 MHz
Table 4.4 shows the frequency division ratios that can be specified with FRQCR.
Source
EXTAL input or crystal resonator
Clock Operating Mode
Clock Operating Mode
PLL Circuit
ON (×8)
Rev. 5.00 Mar. 06, 2009 Page 61 of 770
Input to Divider
×8
REJ09B0243-0500