DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 466

• 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: -

14.5.3
If a rising edge of the external event input is detected after the START bit in TWCR2 has been set
to 1, a count enable signal is set. At this time, if the TWCNT input clock exists, TWCNT starts
incrementing. Figure 14.5 shows the count start timing for duty measurement.
14.5.4
When a falling edge of the external event signal is detected during duty measurement, the
TWCNT value is transferred to TWICR. Figure 14.6 shows the capture timing during duty
measurement.
Rev.2.00 May. 28, 2009 Page 426 of 732
REJ09B0059-0200
External signal
External signal
Capture signal
Count enable
Internal clock
input clock
TWCNT
TWCNT
TWCNT
TWICR
signal
Count Start Timing for Duty Measurement
Capture Timing during Duty Measurement
Figure 14.6 Input Capture Timing during Duty Measurement
Figure 14.5 Count Start Timing for Duty Measurement
N-1
n
00
N
N
01