DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 684

• 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: -

21.5
21.5.1
Since all kinds of characteristics of the resonator are closely related to the board design by the
user, use the example of resonator connection in this document for only reference; be sure to use
an resonator that has been sufficiently evaluated by the user. Consult with the resonator
manufacturer about the resonator circuit ratings which vary depending on the stray capacitances of
the resonator and installation circuit. Make sure the voltage applied to the oscillation pins do not
exceed the maximum rating.
21.5.2
When using a crystal resonator, the crystal resonator and its load capacitors should be placed as
close as possible to the EXTAL and XTAL pins. Other signal lines should be routed away from
the oscillation circuit to prevent inductive interference with the correct oscillation as shown in
figure 21.7.
21.5.3
Even if a crystal resonator is not connected to the EXTAL and XTAL pins or an external clock is
not input, self-oscillation may occur at the several kHz frequency. Therefore, make sure that this
LSI operates at the correct frequency.
Rev.2.00 May. 28, 2009 Page 644 of 732
REJ09B0059-0200
Usage Notes
Note on Resonator
Notes on Board Design
Notes on Operation Confirmation
Figure 21.7 Note on Board Design of Oscillation Circuit Section
Prohibited
C
C
L2
L1
Signal A Signal B
XTAL
EXTAL
This LSI