DF2134AFA20V Renesas Electronics America, DF2134AFA20V Datasheet - Page 433

• Manufacturer Part Number: DF2134AFA20V
• Description: IC H8S/2100 MCU FLASH 80QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2134AFA20V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: IrDA, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 58
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 80-QFP
• For Use With: 3DK2166 - DEV EVAL KIT H8S/2166
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Bit 7—Overflow Flag (OVF): A status flag that indicates that TCNT has overflowed from H'FF
to H'00.
Note:
Bit 6—Timer Mode Select (WT/IT IT IT IT): Selects whether the WDT is used as a watchdog timer or
interval timer. If used as an interval timer, the WDT generates an interval timer interrupt request
(WOVI) when TCNT overflows. If used as a watchdog timer, the WDT generates a reset or NMI
interrupt when TCNT overflows.
Bit 5—Timer Enable (TME): Selects whether TCNT runs or is halted.
TCSR0 Bit 4—Reset Select (RSTS): Reserved. This bit should not be set to 1.
Bit 7
OVF
0
1
Bit 6
WT/IT IT IT IT
0
1
Bit 5
TME
0
1
* When OVF flag is polled and the interval timer interrupt is disabled, OVF=1 must be
read at least twice.
Description
[Clearing conditions]
[Setting condition]
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.)
Description
Interval timer: Sends the CPU an interval timer interrupt request (WOVI) when TCNT
overflows
Watchdog timer: Generates a reset or NMI interrupt when TCNT overflows
Description
TCNT is initialized to H'00 and halted
TCNT counts
Write 0 in the TME bit
Read TCSR when OVF = 1 * , then write 0 in OVFA
Rev. 4.00 Jun 06, 2006 page 377 of 1004
Section 14 Watchdog Timer (WDT)
REJ09B0301-0400
(Initial value)
(Initial value)
(Initial value)