DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 631

• 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: -

17.5
When the pin is set in on-board programming mode and the reset start is executed, the on-board
programming state that can program/erase the on-chip flash memory is entered. On-board
programming mode has two operating modes: user program mode and boot mode.
For details on the pin setting for entering each mode, see table 17.1. For details on the state
transition of each mode for flash memory, see figure 17.2.
17.5.1
Boot mode executes programming/erasing user MAT by means of the control command and
program data transmitted from the host using the on-chip SCI. The tool for transmitting the control
command and program data must be prepared in the host. The SCI communication mode is set to
asynchronous mode. When reset start is executed after this LSI's pin is set in boot mode, the boot
program in the microcomputer is initiated. After the SCI bit rate is automatically adjusted, the
communication with the host is executed by means of the control command method.
The system configuration diagram in boot mode is shown in figure 17.6. For details on the pin
setting in boot mode, see table 17.1. Although NMI and other interrupts are ignored in boot mode,
do not generate them.
On-Board Programming Mode
Boot Mode
tool and program
programming
Host
Boot
data
Figure 17.6 System Configuration in Boot Mode
Control command, program data
Reply response
analysis execution
Control command,
software (on-chip)
RXD1
TXD1
On-chip SCI1
Rev. 5.00 Mar. 06, 2009 Page 611 of 770
This LSI
On-chip RAM
memory
Flash
REJ09B0243-0500