DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 656

• Manufacturer Part Number: DF2437FV
• Description: IC H8S/2437 MCU FLASH 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of DF2437FV

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 85
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

(f) Operating Clock Frequency Inquiry
The boot program will return the number of operating clock frequencies, and the maximum and
minimum values.
Command
Response
Rev.2.00 May. 28, 2009 Page 616 of 732
REJ09B0059-0200
• Number of types (one byte): The number of supported multiplied clock types
• Number of multiplication ratios (one byte): The number of multiplication ratios for each
• Multiplication ratio (one byte)
• SUM (one byte): Checksum
• Command, H'23, (one byte): Inquiry regarding operating clock frequencies
• Response, H'33, (one byte): Response to operating clock frequency inquiry
• Size (one byte): The number of bytes that represents the minimum values, maximum
• Number of operating clock frequencies (one byte): The number of supported operating
• Minimum value of operating clock frequency (two bytes): The minimum value of the
(e.g. when there are two multiplied clock types, which are the main and peripheral clocks,
the number of types will be H'02.)
type
(e.g. the number of multiplication ratios to which the main clock can be set and the
peripheral clock can be set.)
Multiplication ratio: The value of the multiplication ratio (e.g. when the clock-frequency
multiplier is four, the value of multiplication ratio will be H'04.)
Division ratio: The inverse of the division ratio, i.e. a negative number (e.g. when the clock
is divided by two, the value of division ratio will be H'FE. H'FE = D'−2)
The number of multiplication ratios returned is the same as the number of multiplication
ratios and as many groups of data are returned as there are types.
values, and the number of frequencies.
clock frequency types
(e.g. when there are two operating clock frequency types, which are the main and
peripheral clocks, the number of types will be 2.)
multiplied or divided clock frequency.
H'23
H'33
Minimum value of
operating clock frequency
···
SUM
Size
Number of operating
clock frequencies
Maximum value of operating clock
frequency