DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 287

• 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: -

This LSI has an on-chip 16-bit free-running timer (FRT) with two channels. The FRT operates on
the basis of the 16-bit free-running counter (FRC), and outputs two independent waveforms, and
measures the input pulse width and external clock periods.
10.1
• Selection of four clock sources
• Two independent comparators
• Four independent input captures
• Counter clearing
• Fourteen independent interrupts
• Special functions provided by automatic addition function
Figure 10.1 shows a block diagram of the FRT.
TIM8FR1A_000020020300
One of the three internal clocks (φ/2, φ/8, or φ/32), or an external clock input can be selected
(enabling use as an external event counter).
Two independent waveforms can be output.
The rising or falling edge can be selected.
Buffer modes can be specified.
The free-running counters can be cleared on compare-match A.
Two compare-match interrupts, four input capture interrupts, and one overflow interrupt can be
requested independently for each channel.
The contents of OCRAR and OCRAF can be added to the contents of OCRA automatically,
enabling a periodic waveform to be generated without software intervention. The contents of
ICRD can be added automatically to the contents of OCRDM × 2, enabling input capture
operations in this interval to be restricted.
Features
Section 10 16-Bit Free-Running Timer (FRT)
Rev.2.00 May. 28, 2009 Page 247 of 732
REJ09B0059-0200