HD64F2638F20J Renesas Electronics America, HD64F2638F20J Datasheet - Page 491
HD64F2638F20J
Manufacturer Part Number
HD64F2638F20J
Description
IC H8S MCU FLASH 256K 128-QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2600r
Specifications of HD64F2638F20J
Core Processor
H8S/2600
Core Size
16-Bit
Speed
20MHz
Connectivity
CAN, SCI, SmartCard
Peripherals
Motor Control PWM, POR, PWM, WDT
Number Of I /o
72
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 12x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
128-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
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Manufacturer
Quantity
Price
Company:
Part Number:
HD64F2638F20J
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H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
12.3.2
To use the WDT as an interval timer, clear the WT/IT bit in TCSR to 0 and set the TME bit to 1.
An interval timer interrupt (WOVI) is generated each time TCNT overflows, provided that the
WDT is operating as an interval timer, as shown in figure 12-5. This function can be used to
generate interrupt requests at regular intervals.
12.3.3
The OVF flag is set to 1 if TCNT overflows during interval timer operation. At the same time, an
interval timer interrupt (WOVI) is requested. This timing is shown in figure 12-6.
With WDT1, the OVF bit of the TCSR is set to 1 and a simultaneous NMI interrupt is requested
when the TCNT overflows if the NMI request has been chosen in the watchdog timer mode.
REJ09B0103-0800 Rev. 8.00
May 28, 2010
Legend:
WOVI: Interval timer interrupt request generation
H'FF
H'00
TCNT value
WT/IT = 0
TME = 1
Interval Timer Operation
Timing of Setting Overflow Flag (OVF)
Overflow
WOVI
Figure 12-5 Interval Timer Operation
Overflow
WOVI
Overflow
WOVI
Section 12 Watchdog Timer
Overflow
WOVI
Page 441 of 1458
Time
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