DF2166VTE33 Renesas Electronics America, DF2166VTE33 Datasheet - Page 382

• Manufacturer Part Number: DF2166VTE33
• Description: MCU FLASH 3V 512K 33MHZ 144TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2166VTE33

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 33MHz
• Connectivity: I²C, IrDA, LPC, SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 106
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 40K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-TQFP, 144-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

13.3
The WDT has the following registers. To prevent accidental overwriting, TCSR and TCNT have
to be written to in a method different from normal registers. For details, see section 13.6.1, Notes
on Register Access. For details on the system control register, see section 3.2.2, System Control
Register (SYSCR).
• Timer counter (TCNT)
• Timer control/status register (TCSR)
13.3.1
TCNT is an 8-bit readable/writable up-counter.
TCNT is initialized to H'00 when the TME bit in timer control/status register (TCSR) is cleared
to 0.
13.3.2
TCSR selects the clock source to be input to TCNT, and the timer mode.
• TCSR_0
Rev. 3.00, 03/04, page 340 of 830
Bit
7
6
Bit Name Initial Value R/W
OVF
WT/IT
Register Descriptions
Timer Counter (TCNT)
Timer Control/Status Register (TCSR)
0
0
R/(W)* Overflow Flag
R/W
Description
Indicates that TCNT has overflowed (changes from H'FF
to H'00).
[Setting conditions]
•
•
[Clearing conditions]
•
•
Timer Mode Select
Selects whether the WDT is used as a watchdog timer or
interval timer.
0: Interval timer mode
1: Watchdog timer mode
When TCNT overflows (changes from H'FF to H'00)
When internal reset request generation is selected in
watchdog timer mode, OVF is cleared automatically
by the internal reset.
When TCSR is read when OVF = 1, then 0 is written
to OVF
When 0 is written to TME