DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 663

• 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: -

Response
Error
response
⎯ Command H'3F (1 byte): New bit rate selection
⎯ Size (1 byte): The total length of the bit rate, input frequency, number of multipliers, and
⎯ Bit rate (2 bytes): New bit rate
⎯ Input frequency (2 bytes): The frequency of the clock signal fed to the boot program
⎯ Number of multipliers (1 byte): The number of selectable frequency multipliers and
⎯ Multiplier 1 (1 byte): Multiplier or divisor for the main operating frequency
⎯ Multiplier 2 (1 byte): Multiplier or divisor for the peripheral operating frequency
⎯ SUM (1 byte): Checksum
⎯ Response H'06 (1 byte): Response to the new-bit-rate selection command
⎯ Error response H'BF (1 byte): Error response to new bit rate selection
⎯ ERROR (1 byte): Error code
multiplier fields
The bit rate value divided by 100 should be set here (for example, to select 19200 bps, the
set H'00C0, which is 192 in decimal notation).
This should be the frequency in MHz to the second decimal place, multiplied by 100 (for
example, if the frequency is 28.882 MHz, the values is truncated to the second decimal
place and multiplied by 100, making 2888; so H'0B48 should be set in this field).
divisors for the device.
This is normally 2, which indicates the main operating frequency and the operating
frequency of the peripheral modules.
Multiplier: Numerical value of the frequency multiplier (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)
Multiplier: Numerical value of the frequency multiplier (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)
This is the ACK code and is returned if the specified bit rate has been selected.
H'11: Sum-check error
H'24: Bit rate selection error (the specified bit rate is not selectable).
H'25: Input frequency error (the specified input frequency is not within the range from the
H'06
H'BF
minimum to the maximum value).
ERROR
Rev. 5.00 Mar. 06, 2009 Page 643 of 770
REJ09B0243-0500