DF2345TE20 Renesas Electronics America, DF2345TE20 Datasheet - Page 421

• 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

11.1
The H8S/2345 Group has a single-channel on-chip watchdog timer (WDT) for monitoring system
operation. The WDT outputs an overflow signal (WDTOVF) * if a system crash prevents the CPU
from writing to the timer counter, allowing it to overflow. At the same time, the WDT can also
generate an internal reset signal for the H8S/2345 Group.
When this watchdog function is not needed, the WDT can be used as an interval timer. In interval
timer operation, an interval timer interrupt is generated each time the counter overflows.
11.1.1
WDT features are listed below.
Note: * The WDTOVF pin function is not supported by the F-ZTAT version.
Switchable between watchdog timer mode and interval timer mode
WDTOVF output * when in watchdog timer mode
If the counter overflows, the WDT outputs WDTOVF. * It is possible to select whether or not
the entire H8S/2345 Group is reset at the same time. This internal reset can be a power-on
reset or a manual reset.
Interrupt generation when in interval timer mode
If the counter overflows, the WDT generates an interval timer interrupt.
Choice of eight counter clock sources.
Overview
Features
Section 11 Watchdog Timer
Rev. 4.00 Feb 15, 2006 page 395 of 900
Section 11 Watchdog Timer
REJ09B0291-0400