DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 665

• 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: -

Acknowledge
Response
When the new bit rate is selectable, the boot program returns an ACK code to the host and then
makes the register setting to select the new bit rate. The host then sends an ACK code at the
new bit rate, and the boot program responds to this with another ACK code, this time at the
new bit rate.
⎯ Acknowledge H'06 (1 byte): The ACK code sent by the host to acknowledge the new bit
⎯ Response H'06 (1 byte): The ACK code transferred in response to acknowledgement of the
The sequence of new bit rate selection is shown in figure 17.18.
rate.
new bit rate
period at the current
Setting the new
Wait for one-bit
bit rate setting
bit rate
H'06
H'06
Host
Figure 17.18 Sequence of New Bit Rate Selection
H'06 (ACK) at the new bit rate
H'06 (ACK) at the new bit rate
New bit rate setting
H'06 (ACK)
Rev. 5.00 Mar. 06, 2009 Page 645 of 770
New bit rate setting
Boot program
REJ09B0243-0500