DF2505BR26DV Renesas Electronics America, DF2505BR26DV Datasheet - Page 425

• Manufacturer Part Number: DF2505BR26DV
• Description: IC H8S/2505 MCU FLASH 176-LFBGA
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2500r

Specifications of DF2505BR26DV

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 26MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 104
• Program Memory Size: 384KB (384K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 176-LFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

The watchdog timer (WDT) is an 8-bit timer in two channels that can reset this LSI internally or
generate the internal NMI interrupt, if a system crash prevents the CPU from writing to the timer.
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.
The block diagram of the WDT is shown in figure 12.1.
12.1
• Selectable from eight counter input clocks for WDT_0
• Switchable between watchdog timer mode and interval timer mode
Watchdog timer mode
• If the counter in WDT_0 overflows, it is possible to select whether this LSI is internally reset
• Power-on reset and manual reset are selectable for internal reset
• If the counter in WDT_1 overflows, it is possible to select whether this LSI is internally reset
Interval timer mode
• If the counter overflows, the WDT generates an interval timer interrupt (WOVI)
• Selected clock can be output from BUZZ output pin (WDT_1)
Selectable from 16 counter input clocks for WDT_1
or not
at a power-on timing or the internal NMI interrupt is generated
Features
Section 12 Watchdog Timer (WDT)
Rev. 6.00 Sep. 24, 2009 Page 377 of 928
Section 12 Watchdog Timer (WDT)
REJ09B0099-0600