DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 464
DF2148RTE20IV
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
-
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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
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