D12312SVTEBL25 Renesas Electronics America, D12312SVTEBL25 Datasheet - Page 463

• Manufacturer Part Number: D12312SVTEBL25
• Description: IC H8S MCU ROMLESS 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of D12312SVTEBL25

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Type: ROMless
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 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: -
• Program Memory Size: -
• Other names: HD6412312SVTEBL25; HD6412312SVTEBL25

11.5.2
If bits CKS2 to CKS0 in TCSR are written to while the WDT is operating, errors may 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 may 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 chip, the chip 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 output function is not available in the F-ZTAT versions.
Note: * The WDTOVF output function is not available in F-ZTAT versions.
Changing Value of CKS2 to CKS0
Switching between Watchdog Timer Mode and Interval Timer Mode
System Reset by WDTOVF Signal *
Figure 11.9 Circuit for System Reset by WDTOVF Signal (Example)
Reset signal to entire system
Reset input
Rev.7.00 Feb. 14, 2007 page 429 of 1108
Section 11 Watchdog Timer
Chip
REJ09B0089-0700
WDTOVF *
RES