DF3048X16V Renesas Electronics America, DF3048X16V Datasheet - Page 473

• Manufacturer Part Number: DF3048X16V
• Description: MCU 5V 128K,PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3048X16V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 70
• 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: Lead free / RoHS Compliant
• Eeprom Size: -

12.3.4
The WRST bit in RSTCSR is valid when bits WT/IT and TME are both set to 1 in TCSR.
Figure 12.7 shows the timing of setting of WRST and the internal reset timing. The WRST bit is
set to 1 when TCNT overflows and OVF is set to 1. At the same time an internal reset signal is
generated for the entire chip. This internal reset signal clears OVF to 0, but the WRST bit remains
set to 1. The reset routine must therefore clear the WRST bit.
TCNT
Overflow signal
OVF
WDT internal
reset
WRST
Timing of Setting of Watchdog Timer Reset Bit (WRST)
Figure 12.7 Timing of Setting of WRST Bit and Internal Reset
H'FF
H'00
Rev. 7.00 Sep 21, 2005 page 447 of 878
Section 12 Watchdog Timer
REJ09B0259-0700