DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 468

• 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: -

14.5.7
The overflow flag (OVF) in TWCR2 is set to 1 by the overflow signal which is output when
TCNT overflows from H'FF to H'00. Figure 14.9 shows the OVF set timing.
14.6
The duty measurement circuit can request two interrupts: TWOVI and TWENDI. Table 14.2 lists
the sources and priorities of these interrupts. Each interrupt can be enabled or disabled by an
interrupt enable bit in TCR or TCSR. Independent signals are sent to the interrupt controller for
each interrupt.
Table 14.2 Interrupt Sources for Duty Measurement Circuit
Rev.2.00 May. 28, 2009 Page 428 of 732
REJ09B0059-0200
Interrupt
TWENDI
TWOVI
Overflow signal
TWCNT
OVF
Set Timing for Overflow Flag (OVF)
Interrupt Sources
Interrupt Source
Duty measurement end
TWCNT overflow
Figure 14.9 Set Timing for OVF Flag
N'FF
OVF
Interrupt Flag
ENDF
N'00
Priority
High
Low