HD64F2623FA20J Renesas Electronics America, HD64F2623FA20J Datasheet - Page 431

• Manufacturer Part Number: HD64F2623FA20J
• Description: IC H8S MCU FLASH 256K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2600r

Specifications of HD64F2623FA20J

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: CAN, SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 12K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

In interval timer mode, to clear OVF flag in WOVI handling routine, read TCSR when OVF = 1,
then write with 0 to OVF, as stated above.
When WOVI is masked and OVF flag is poling, if contention between OVF flag set and TCSR
read is occurred, OVF = 1 is read but OVF can not be cleared by writing with 0 to OVF.
In this case, reading TCSR when OVF = 1 two times meet the requirements of OVF clear
condition. Please read TCSR when OVF = 1 two times before writing with 0 to OVF.
Bit 6—Timer Mode Select (WT/IT IT IT IT): Selects whether the WDT is used as a watchdog timer or
interval timer. When TCNT overflows, WDT0 generates the WDTOVF signal when in watchdog
timer mode, or a WOVI interrupt request to the CPU when in interval timer mode. WDT1
generates a reset or NMI interrupt request when in watchdog timer mode, or a WOVI interrupt
request to the CPU when in interval timer mode.
Note:
Note:
Bit 5—Timer Enable (TME): Selects whether TCNT runs or is halted.
WDT0
WT/IT IT IT IT
0
1
WDT1
WT/IT IT IT IT
0
1
Bit 5
TME
0
1
WDT0 Mode Select
WDT1 Mode Select *
* For details on a TCNT overflow in watchdog timer mode, see section 12.2.3, Reset
* Cannot be used in the H8S/2623 Group.
Control/Status Register (RSTCSR).
Description
Interval timer mode: WDT0 requests an interval timer interrupt (WOVI)
from the CPU when the TCNT overflows.
Watchdog timer mode: WDT0 outputs a WDTOVF signal when the TCNT overflows. *
Description
Interval timer mode: WDT1 requests an interval timer interrupt (WOVI)
from the CPU when the TCNT overflows.
Watchdog timer mode: WDT1 requests a reset or an NMI interrupt from
the CPU when the TCNT overflows.
Description
TCNT is initialized to H'00 and halted
TCNT counts
Rev. 5.00 Jan 10, 2006 page 405 of 1042
Section 12 Watchdog Timer
REJ09B0275-0500
(Initial value)
(Initial value)
(Initial value)