DF61657CN35FTV Renesas Electronics America, DF61657CN35FTV Datasheet - Page 571

• Manufacturer Part Number: DF61657CN35FTV
• Description: IC H8SX/1657 MCU FLASH 120TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of DF61657CN35FTV

• Core Processor: H8SX
• Core Size: 32-Bit
• Speed: 35MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 82
• Program Memory Size: 768KB (768K x 8)
• Program Memory Type: FLASH
• Ram Size: 24K 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: 120-TQFP, 120-VQFP
• For Use With: 3DK1657 - DEV EVAL KIT FOR H8SX/1657
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

13.4.2
To use the WDT as an interval timer, set the WT/IT bit to 0 and the TME bit to 1 in TCSR.
When the WDT is used as an interval timer, an interval timer interrupt (WOVI) is generated each
time the TCNT overflows. Therefore, an interrupt can be generated at intervals.
When the TCNT overflows in interval timer mode, an interval timer interrupt (WOVI) is requested
at the same time the OVF bit in the TCSR is set to 1.
Interval Timer Mode
WDTOVF signal
Internal
reset signal *
Notes: 1. If TCNT overflows when the RSTE bit is set to 1, an internal reset signal is generated.
[Legend]
WOVI: Interval timer interrupt request
H'FF
H'00
2. 130 states when the RSTE bit is cleared to 0.
TCNT value
1
H'FF
H'00
WT/IT = 0
TME = 1
TCNT value
Figure 13.2 Operation in Watchdog Timer Mode
Figure 13.3 Operation in Interval Timer Mode
WT/IT = 1
TME = 1
Overflow
WOVI
H'00 written
to TCNT
Overflow
WDTOVF and internal
reset are generated
WOVI
Overflow
133 states *
WOVF = 1
519 states
Overflow
WOVI
Rev. 2.00 Jun. 28, 2007 Page 545 of 864
2
WT/IT = 1
TME = 1
Section 13 Watchdog Timer (WDT)
Overflow
WOVI
H'00 written
to TCNT
Time
REJ09B0341-0200
Time