DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 464

• Manufacturer Part Number: DF2148RTE20IV
• Description: MCU 5V 128K I-TEMP,PB-FREE, 100-
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148RTE20IV

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: Host Interface, I²C, IrDA, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 74
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 14 Watchdog Timer (WDT)
14.3.3
The OVF flag is set to 1 if TCNT overflows during interval timer operation. At the same time, an
interval timer interrupt (WOVI) is requested. This timing is shown in figure 14.5.
If NMI request generation is selected in watchdog timer mode, when TCNT overflows the OVF
bit in TCSR is set to 1 and at the same time an NMI interrupt is requested.
Rev. 4.00 Sep 27, 2006 page 418 of 1130
REJ09B0327-0400
Legend:
WOVI: Interval timer interrupt request generation
H'FF
H'00
TCNT count
TCNT
Overflow signal
(internal signal)
OVF
WT/IT = 0
TME = 1
Timing of Setting of Overflow Flag (OVF)
Figure 14.4 Operation in Interval Timer Mode
Overflow
WOVI
Figure 14.5 Timing of OVF Setting
H'FF
Overflow
WOVI
Overflow
WOVI
H'00
Overflow
WOVI
Time