DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 300

• 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: -

10.5
10.5.1
Figure 10.3 shows the FRC increment timing with an internal clock source. Figure 10.4 shows the
increment timing with an external clock source. The pulse width of the external clock signal must
be at least 1.5 system clocks (φ). The counter will not increment correctly if the pulse width is
shorter than 1.5 system clocks (φ).
Rev.2.00 May. 28, 2009 Page 260 of 732
REJ09B0059-0200
φ
External clock
input pin
FRC input
clock
FRC
Internal clock
FRC input
clock
FRC
Operation Timing
FRC Increment Timing
φ
Figure 10.4 Increment Timing with External Clock Source
Figure 10.3 Increment Timing with Internal Clock Source
N – 1
N
N
N + 1
N + 1