HD6417751RF240V Renesas Electronics America, HD6417751RF240V Datasheet - Page 383

• Manufacturer Part Number: HD6417751RF240V
• Description: MPU 1.5/3.3V 0K PB-FREE 256-QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7750r

Specifications of HD6417751RF240V

• Core Processor: SH-4
• Core Size: 32-Bit
• Speed: 240MHz
• Connectivity: EBI/EMI, FIFO, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 39
• Program Memory Type: ROMless
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-QFP Exposed Pad, 256-eQFP, 256-HQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Bit 4—Watchdog Timer Overflow Flag (WOVF): Indicates that WTCNT has overflowed in
watchdog timer mode. This flag is not set in interval timer mode.
Bit 4: WOVF
0
1
Bit 3—Interval Timer Overflow Flag (IOVF): Indicates that WTCNT has overflowed in
interval timer mode. This flag is not set in watchdog timer mode.
Bit 3: IOVF
0
1
Bits 2 to 0—Clock Select 2 to 0 (CKS2–CKS0): These bits select the clock used for the WTCNT
count from eight clocks obtained by dividing the frequency divider 2 input clock*. The overflow
periods shown in the following table are for use of a 33 MHz input clock, with frequency divider 1
off, and PLL circuit 1 on (×6).
Note: * When PLL1 is switched on or off, the clock following the switch is used.
Bit 2: CKS2
0
1
Note: The up-count may not be performed correctly if bits CKS2–CKS0 are modified while the
WDT is running. Always stop the WDT before modifying these bits.
Bit 1: CKS1
0
1
0
1
Description
No overflow
WTCNT has overflowed in watchdog timer mode
Description
No overflow
WTCNT has overflowed in interval timer mode
Bit 0: CKS0
0
1
0
1
0
1
0
1
Clock Division Ratio
1/32
1/64
1/128
1/256
1/512
1/1024
1/2048
1/4096
(Initial value)
Rev.4.00 Oct. 10, 2008 Page 283 of 1122
Description
10. Clock Oscillation Circuits
Overflow Period
41 μs
82 μs
164 μs
328 μs
656 μs
1.31 ms
2.62 ms
5.25 ms
REJ09B0370-0400
(Initial value)
(Initial value)