DF2345TE20 Renesas Electronics America, DF2345TE20 Datasheet - Page 431

• Manufacturer Part Number: DF2345TE20
• Description: MCU 5V 128K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2345TE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 71
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2345TE20; HD64F2345TE20

11.3.2
To use the WDT as an interval timer, clear the WT/IT bit in TCSR to 0 and set the TME bit to 1.
An interval timer interrupt (WOVI) is generated each time TCNT overflows, provided that the
WDT is operating as an interval timer, as shown in figure 11.5. This function can be used to
generate interrupt requests at regular intervals.
WDTOVF signal *
Internal reset signal *
Legend:
WT/IT
TME
Notes: 1. The internal reset signal is generated only if the RSTE bit is set to 1.
Interval Timer Operation
: Timer mode select bit
: Timer enable bit
2. 130 states when the RSTE bit is cleared to 0.
3. The WDTOVF pin function is not supported by the F-ZTAT version.
H'FF
H'00
TCNT count
3
WT/IT = 1
TME = 1
1
Figure 11.4 Watchdog Timer Operation
H'00 written
to TCNT
WDTOVF *
internal reset are
generated
Overflow
132 states *
WOVF=1
Rev. 4.00 Feb 15, 2006 page 405 of 900
518 states
3
and
2
WT/IT = 1
TME = 1
Section 11 Watchdog Timer
H'00 written
to TCNT
REJ09B0291-0400
Time