DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 334

• 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: -

11.5
11.5.1
Figure 11.4 shows the TCNT count timing with an internal clock source. Figure 11.5 shows the
TCNT count timing with an external clock source. The pulse width of the external clock signal
must be at least 1.5 states for a single edge and at least 2.5 states for both edges. The counter will
not increment correctly if the pulse width is less than these values.
Rev.2.00 May. 28, 2009 Page 294 of 732
REJ09B0059-0200
φ
Internal clock
TCNT input
clock
TCNT
φ
External clock
input pin
TCNT input
clock
TCNT
Operation Timing
TCNT Count Timing
Figure 11.5 Count Timing for External Clock Input
Figure 11.4 Count Timing for Internal Clock Input
N – 1
N – 1
N
N
N + 1
N + 1