DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 652

• 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: -

• Bit-rate matching state
In bit-rate matching, the boot program measures the low-level intervals in a signal carrying H'00
data that is transmitted by the host, and calculates the bit rate from this. The bit rate can be
changed by the new-bit-rate selection command. On completion of bit-rate matching, the boot
program goes to the inquiry and selection state. The sequence of processing in bit-rate matching is
shown in figure 17.16.
Rev. 5.00 Mar. 06, 2009 Page 632 of 770
REJ09B0243-0500
Wait for programming/erasure
user MAT
selection
Erase
Figure 17.15 Flow of Processing by the Boot Program
Enter
programming/erasure state
Wait for inquiry and
Bit rate matching
selection
Programming
Reset
Programming
processing
Inquiry
Erasure
processing
processing
Erasure
Inquiry
Programming/erasure state
Inquiry-and-selection state
Selection
Checking
Bit rate matching state
processing
Checking
processing
Selection