HD6417708SF60 Renesas Electronics America, HD6417708SF60 Datasheet - Page 197

• Manufacturer Part Number: HD6417708SF60
• Description: IC SUPERH MPU ROMLESS 144LQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417708SF60

• Core Processor: SH-2
• Core Size: 32-Bit
• Speed: 60MHz
• Connectivity: EBI/EMI, SCI, SmartCard
• Peripherals: POR, WDT
• Number Of I /o: 8
• Program Memory Type: ROMless
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Ram Size: -
• Program Memory Size: -
• Data Converters: -

9.8
9.8.1
Figure 9.4 shows a block diagram of the WDT.
9.8.2
The WDT has two registers that select the clock, switch the timer mode, and perform other
functions. Table 9.5 shows the WDT register.
Table 9.5
Name
Watchdog timer counter
Watchdog timer
control/status register
Note: * Write with a word access. Write H'5A and H'A5, respectively, in the upper bytes. Byte or
cancellation
WTCSR:
WTCNT:
Interrupt
Standby
longword writes are not possible. Read with a byte access.
Internal
request
request
Overview of the Watchdog Timer (WDT)
Block Diagram of the WDT
Register Configurations
reset
Register Configuration
Watchdog timer control/status register
Watchdog timer counter
Interrupt
Standby
control
control
control
Reset
Abbreviation
WTCNT
WTCSR
Figure 9.4 Block Diagram of the WDT
WTCSR
Clock selection
R/W
R/W*
R/W*
Overflow
Bus interface
WDT
Size
R: byte;
W: word*
R: byte;
W: word*
WTCNT
Clock selector
Divider
Initial Value
H'00
H'00
Clock
Internal bus
Standby
mode
Peripheral
clock
Address
H'FFFFFF84
H'FFFFFF86
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