HD64F3026X25 Renesas Electronics America, HD64F3026X25 Datasheet - Page 377

• Manufacturer Part Number: HD64F3026X25
• Description: MCU 3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3026X25

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 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: -

11.1
The H8/3024 Group has an on-chip watchdog timer (WDT). The WDT has two selectable
functions: it can operate as a watchdog timer to supervise system operation, or it can operate as an
interval timer. As a watchdog timer, it generates a reset signal for the H8/3024 chip if a system
crash allows the timer counter (TCNT) to overflow before being rewritten. In interval timer
operation, an interval timer interrupt is requested at each TCNT overflow.
11.1.1
WDT features are listed below.
Selection of eight counter clock sources
Interval timer option
Timer counter overflow generates a reset signal or interrupt.
The reset signal is generated in watchdog timer operation. An interval timer interrupt is
generated in interval timer operation.
Watchdog timer reset signal resets the entire H8/3024 internally, and can also be output
externally.
The reset signal generated by timer counter overflow during watchdog timer operation resets
the entire H8/3024 internally. An external reset signal can be output from the
reset other system devices simultaneously. In the versions with on-chip flash memory, the
R E S O
signal externally.
/2, /32, /64, /128, /256, /512, /2048, or /4096
Overview
Features
pin functions as the FWE pin, and therefore there is no function for outputting a reset
Section 11 Watchdog Timer
Rev. 2.00 Sep 20, 2005 page 337 of 800
Section 11 Watchdog Timer
REJ09B0260-0200
R E S O
pin to