DF2345TE20 Renesas Electronics America, DF2345TE20 Datasheet - Page 435

• 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

11.5.2
If bits CKS2 to CKS0 in TCSR are written to while the WDT is operating, errors could occur in
the incrementation. Software must stop the watchdog timer (by clearing the TME bit to 0) before
changing the value of bits CKS2 to CKS0.
11.5.3
If the mode is switched from watchdog timer to interval timer, or vice versa, while the WDT is
operating, errors could occur in the incrementation. Software must stop the watchdog timer (by
clearing the TME bit to 0) before switching the mode.
11.5.4
If the WDTOVF output signal * is input to the RES pin of the H8S/2345 Group, the H8S/2345
Group will not be initialized correctly. Make sure that the WDTOVF signal * is not input logically
to the RES pin. To reset the entire system by means of the WDTOVF signal * , use the circuit
shown in figure 11.9.
Note: * The WDTOVF pin function is not supported by the F-ZTAT version.
Note: * The WDTOVF pin function is not supported by the F-ZTAT version.
Changing Value of CKS2 to CKS0
Switching between Watchdog Timer Mode and Interval Timer Mode
System Reset by WDTOVF
Reset signal to entire system
Figure 11.9 Circuit for System Reset by WDTOVF
Reset input
WDTOVF Signal
WDTOVF
WDTOVF
WDTOVF Signal (Example)
WDTOVF
WDTOVF
Rev. 4.00 Feb 15, 2006 page 409 of 900
Section 11 Watchdog Timer
WDTOVF *
RES
H8S/2345
REJ09B0291-0400