DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 481

• 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: -

15.3.3
When TCNT overflows in watchdog timer mode, the OVF bit in TCSR is set to 1. When the
RST/NMI bit is set to 1 here, the internal reset signal is generated for the entire LSI. The timing is
shown in figure 15.5.
15.4
During interval timer mode operation, an overflow generates an interval timer interrupt (WOVI).
The interval timer interrupt is requested whenever the OVF flag is set to 1 in TCSR. The OVF flag
must be cleared to 0 in the interrupt handling routine.
When the NMI interrupt request is selected in watchdog timer mode, an NMI interrupt request is
generated by an overflow.
Table 15.1 Interrupt Source
Name
WOVI
Overflow signal
(internal signal)
φ
OVF
Internal reset
signal
TCNT
Internal Reset Signal Generation Timing
Interrupt Sources
Interrupt Source
TCNT overflow
Figure 15.5 Internal Reset Signal Generation Timing
H'FF
Interrupt Flag
OVF
Rev.2.00 May. 28, 2009 Page 441 of 732
H'00
518 states
REJ09B0059-0200