R8A77850ADBGV#RD0Z Renesas Electronics America, R8A77850ADBGV#RD0Z Datasheet - Page 809

• Manufacturer Part Number: R8A77850ADBGV#RD0Z
• Description: IC SUPERH MPU ROMLESS 436-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R8A77850ADBGV#RD0Z

• Core Processor: SH-4A
• Core Size: 32-Bit
• Speed: 600MHz
• Connectivity: Audio Codec, MMC, Serial Sound, SCI, SIO, SPI, SSI
• Peripherals: DMA, POR, WDT
• Number Of I /o: 108
• Program Memory Type: ROMless
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1 V ~ 1.2 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 436-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

16.5.2
The time period taken by power-on reset on watchdog timer overflow (WDT reset holding time) is
equal to or more than 40 cycles of the peripheral clock (Pck).
The transition time from watchdog timer overflow to the power-on reset state (WDT reset setup
time) is equal to or more than 40 cycles of the peripheral clock (Pck).
If the bus clock frequency has been changed from the initial value, the oscillation settling time of
PLL2 circuit and the time until the LSI resumes operation (WDT count up) are also required. In
this case, the WDT reset holding time is two peripheral clock (Pck) cycles or more.
(1)
The timing of indicating the reset state or normal operation on the STATUS[1:0] pins is
synchronous with the peripheral clock (Pck), and is therefore asynchronous with the clocks input
from the EXTAL pin and the CLKOUT pin.
WDT overflow
signal
EXTAL
input
CLKOUT
output
CLKOUTENB
output
STATUS[1:0]
output
Power-On Reset Caused by Watchdog Timer Overflow during Normal Operation
Figure 16.6 STATUS Output by Power-On Reset Caused by WDT Overflow
Power-On Reset by Watchdog Timer Overflow
WDT reset setup time
LL (normal)
during Normal Operation
PLL oscillation
settling time
HH (reset)
WDT count up
Rev.1.00 Jan. 10, 2008 Page 777 of 1658
16. Watchdog Timer and Reset (WDT)
WDT reset
holding time
REJ09B0261-0100
LL (normal)