R8A77800ANBGAV Renesas Electronics America, R8A77800ANBGAV Datasheet - Page 678

• Manufacturer Part Number: R8A77800ANBGAV
• Description: IC SUPERH MPU ROMLESS 449-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R8A77800ANBGAV

• Core Processor: SH-4A
• Core Size: 32-Bit
• Speed: 400MHz
• Connectivity: Audio Codec, MMC, Serial Sound, SCI, SIO, SPI, SSI
• Peripherals: DMA, POR, WDT
• Number Of I /o: 75
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.15 V ~ 1.35 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 449-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Section 16 Watchdog Timer and Reset
Figure 16.1 shows a block diagram of the WDT.
Rev.1.00 Dec. 13, 2005 Page 626 of 1286
REJ09B0158-0100
PRESET
[Legend]
WDTBCNT: Watchdog timer base counter
WDTBST:
WDTCNT:
WDTCSR: Watchdog timer control/status register
WDTST:
Comparator
WDTCSR
Watchdog timer base stop time register
Watchdog timer counter
Watchdog timer stop time register
WDTCNT
WDTST
Watchdog timer and Reset
Figure 16.1 Block Diagram of WDT
Reset control
control circuit
Interrupt
circuit
Count-up signal
Overflow
Internal reset request
Internal reset request
WDTBCNT
WDTBST
Clear
Peripheral clock
INTC
CPG
2
MRESETOUT
STATUS[1:0]