DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 475

• 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 incorporates the watchdog timer (WDT). The WDT is an 8-bit timer that can generate an
internal reset signal or an internal NMI interrupt signal if a system crash prevents the CPU from
writing to the timer counter, thus allowing it to overflow.
When this watchdog timer function is not needed, the WDT can be used as an interval timer. In
interval timer operation, an interval timer interrupt is generated each time the counter overflows.
15.1
• Selectable from eight counter input clocks.
• Switchable between watchdog timer mode and interval timer mode
Watchdog Timer Mode:
•
Interval Timer Mode:
•
WDT0102A_000020020300
If the counter overflows, an internal reset or an internal NMI interrupt is generated.
If the counter overflows, an interval timer interrupt (WOVI) is generated.
Features
Section 15 Watchdog Timer (WDT)
Rev.2.00 May. 28, 2009 Page 435 of 732
REJ09B0059-0200