HD64F7047FW40V Renesas Electronics America, HD64F7047FW40V Datasheet - Page 359

• Manufacturer Part Number: HD64F7047FW40V
• Description: MCU 5V 256K I-TEMP,PB-FREE 100-Q
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7047r

Specifications of HD64F7047FW40V

• Core Processor: SH-2
• Core Size: 32-Bit
• Speed: 40MHz
• Connectivity: CAN, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 12K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

The watchdog timer (WDT) is an 8-bit timer that can reset this LSI internally if the counter
overflows without rewriting the counter value due to a system crash or the like.
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 11.1.
11.1
• Switchable between watchdog timer mode and interval timer mode
In watchdog timer mode
• Output WDTOVF signal
In interval timer mode
• If the counter overflows, the WDT generates an interval timer interrupt (ITI).
• Clears software standby mode
• Selectable from eight counter input clocks.
If the counter overflows, it is possible to select whether this LSI is internally reset or not. A
power-on reset or manual reset can be selected as an in internal reset.
Features
Section 11 Watchdog Timer
Rev. 2.00, 09/04, page 317 of 720