HD6417708SF60V Renesas Electronics America, HD6417708SF60V Datasheet - Page 198
HD6417708SF60V
Manufacturer Part Number
HD6417708SF60V
Description
IC SUPERH MPU ROMLESS 208LQFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7700r
Datasheet
1.HD6417708SF60V.pdf
(635 pages)
Specifications of HD6417708SF60V
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
208-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Ram Size
-
Program Memory Size
-
Data Converters
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD6417708SF60V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Part Number:
HD6417708SF60V
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
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9.9
9.9.1
The watchdog timer counter (WTCNT) is an 8-bit read/write counter that increments on the
selected clock. When an overflow occurs, it generates a reset in watchdog timer mode and an
interrupt in interval time mode. Its address is H'FFFFFF84. The WTCNT counter is initialized to
H'00 only by a power-on reset through the RESET pin. Use a word access to write to the WTCNT
counter, with H'5A in the upper byte. Use a byte access to read WTCNT.
9.9.2
The watchdog timer control/status register (WTCSR) is an 8-bit read/write register composed of
bits to select the clock used for the count, bits to select the timer mode, and overflow flags. Its
address is H'FFFFFF86. The WTCSR register is initialized to H'00 only by a power-on reset
through the RESET pin. When a WDT overflow causes an internal reset, the WTCSR retains its
value. When used to count the clock settling time for canceling a standby, it retains its value after
counter overflow. Use a word access to write to the WTCSR counter, with H'A5 in the upper byte.
Use a byte access to read WTCSR.
Bit 7—Timer Enable (TME): Starts and stops timer operation. Clear this bit to 0 when using the
WDT in standby mode or when changing the clock frequency.
Bit 7: TME
0
1
178
Initial value:
Initial value:
WDT Registers
Watchdog Timer Counter (WTCNT)
Watchdog Timer Control/Status Register (WTCSR)
R/W:
R/W:
Bit:
Bit:
TME
R/W
R/W
7
0
7
0
Description
Timer disabled: Count-up stops and WTCNT value is retained
Timer enabled
WT/IT
R/W
R/W
6
0
6
0
RSTS
R/W
R/W
5
0
5
0
WOVF
R/W
R/W
4
0
4
0
IOVF
R/W
R/W
3
0
3
0
CKS2
R/W
R/W
2
0
2
0
CKS1
R/W
R/W
1
0
1
0
(Initial value)
CKS0
R/W
R/W
0
0
0
0
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